diff --git a/.github/workflows/build-and-deploy.yml b/.github/workflows/build-and-deploy.yml
index db2cf04..8af37eb 100644
--- a/.github/workflows/build-and-deploy.yml
+++ b/.github/workflows/build-and-deploy.yml
@@ -1,5 +1,3 @@
-
-
 name: Build and Deploy
 on:
   push:
diff --git a/INSTRUCTIONS.md b/INSTRUCTIONS.md
new file mode 100644
index 0000000..c1cda32
--- /dev/null
+++ b/INSTRUCTIONS.md
@@ -0,0 +1,130 @@
+# Homework 4: L-systems
+
+For this assignment, you will design a set of formal grammar rules to create
+a plant life using an L-system program. Once again, you will work from a
+TypeScript / WebGL 2.0 base code like the one you used in homework 0. You will
+implement your own set of classes to handle the L-system grammar expansion and
+drawing. You will rasterize your L-system using faceted geometry. Feel free
+to use ray marching to generate an interesting background, but trying to
+raymarch an entire L-system will take too long to render!
+
+## Base Code
+The provided code is very similar to that of homework 1, with the same camera and GUI layout. Additionally, we have provided you with a `Mesh` class that, given a filepath, will construct VBOs describing the vertex positions, normals, colors, uvs, and indices for any `.obj` file. The provided code also uses instanced rendering to draw a single square 10,000 times at different locations and with different colors; refer to the Assignment Requirements section for more details on instanced rendering. Farther down this README, we have also provided some example code snippets for setting up hash map structures in TypeScript.
+
+## Assignment Requirements
+- __(15 points)__ Create a collection of classes to represent an L-system. You should have at least the following components to make your L-system functional:
+  - A `Turtle` class to represent the current drawing state of your L-System. It should at least keep track of its current position, current orientation, and recursion depth (how many `[` characters have been found while drawing before `]`s)
+  - A stack of `Turtle`s to represent your `Turtle` history. Push a copy of your current `Turtle` onto this when you reach a `[` while drawing, and pop the top `Turtle` from the stack and make it your current `Turtle` when you encounter a `]`. Note that in TypeScript, `push()` and `pop()` operations can be done on regular arrays.
+  - An expandable string of characters to represent your grammar as you iterate on it.
+  - An `ExpansionRule` class to represent the result of mapping a particular character to a new set of characters during the grammar expansion phase of the L-System. By making a class to represent the expansion, you can have a single character expand to multiple possible strings depending on some probability by querying a `Map<string, ExpansionRule>`.
+  - A `DrawingRule` class to represent the result of mapping a character to an L-System drawing operation (possibly with multiple outcomes depending on a probability).
+
+- __(10 points)__ Set up the code in `main.ts` and `ShaderProgram.ts` to pass a collection of transformation data to the GPU to draw your L-System geometric components using __instanced rendering__. We will be using instanced rendering to draw our L-Systems because it is much more efficient to pass a single transformation for each object to be drawn rather than an entire collection of vertices. The provided base code has examples of passing a set of `vec3`s to offset the position of each instanced object, and a set of `vec4`s to change the color of each object. You should at least alter the following via instanced rendering (note that these can be accomplished with a single `mat4`):
+  - Position
+  - Orientation
+  - Scaling
+
+- __(55 points)__ Your L-System scene must have the following attributes:
+  - Your plant must grow in 3D (branches must not just exist in one plane)
+  - Your plant must have flowers, leaves, or some other branch decoration in addition to basic branch geometry
+  - Organic variation (i.e. noise or randomness in grammar expansion and/or drawing operations)
+  - The background should be a colorful backdrop to complement your plant, incorporating some procedural elements.
+  - A flavorful twist. Don't just make a basic variation of the example F[+FX]-FX from the slides! Create a plant that is unique to you. Make an alien tentacle monster plant if you want to! Play around with drawing operations; don't feel compelled to always make your branches straight lines. Curved forms can look quite visually appealing too.
+
+- __(10 points)__ Using dat.GUI, make at least three aspects of your L-System interactive, such as:
+  - The probability thresholds in your grammar expansions
+  - The angle of rotation in various drawing aspects
+  - The size or color or material of the plant components
+  - Anything else in your L-System expansion or drawing you'd like to make modifiable; it doesn't have to be these particular elements
+
+- __(10 points)__ Following the specifications listed
+[here](https://github.com/pjcozzi/Articles/blob/master/CIS565/GitHubRepo/README.md),
+create your own README.md, renaming the file you are presently reading to
+INSTRUCTIONS.md. Don't worry about discussing runtime optimization for this
+project. Make sure your README contains the following information:
+    - Your name and PennKey
+    - Citation of any external resources you found helpful when implementing this
+    assignment.
+    - A link to your live github.io demo (refer to the pinned Piazza post on
+      how to make a live demo through github.io)
+    - An explanation of the techniques you used to generate your L-System features.
+    Please be as detailed as you can; not only will this help you explain your work
+    to recruiters, but it helps us understand your project when we grade it!
+
+## Writing classes and functions in TypeScript
+Example of a basic Turtle class in TypeScript (Turtle.ts)
+```
+import {vec3} from 'gl-matrix';
+
+export default class Turtle {
+  constructor(pos: vec3, orient: vec3) {
+    this.position = pos;
+    this.orientation = orient;
+  }
+
+  moveForward() {
+    add(this.position, this.position, this.orientation * 10.0);
+  }
+}
+```
+Example of a hash map in TypeScript:
+```
+let expansionRules : Map<string, string> = new Map();
+expansionRules.set('A', 'AB');
+expansionRules.set('B', 'A');
+
+console.log(expansionRules.get('A')); // Will print out 'AB'
+console.log(expansionRules.get('C')); // Will print out 'undefined'
+```
+Using functions as map values in TypeScript:
+```
+function moveForward() {...}
+function rotateLeft() {...}
+let drawRules : Map<string, any> = new Map();
+drawRules.set('F', moveForward);
+drawRules.set('+', rotateLeft);
+
+let func = drawRules.get('F');
+if(func) { // Check that the map contains a value for this key
+  func();
+}
+```
+Note that in the above case, the code assumes that all functions stored in the `drawRules` map take in no arguments. If you want to store a class's functions as values in a map, you'll have to refer to a specific instance of a class, e.g.
+```
+let myTurtle: Turtle = new Turtle();
+let drawRules: Map<string, any> = new Map();
+drawRules.set('F', myTurtle.moveForward.bind(myTurtle));
+let func = drawRules.get('F');
+if(func) { // Check that the map contains a value for this key
+  func();
+}
+```
+TypeScript's `bind` operation sets the `this` variable inside the bound function to refer to the object inside `bind`. This ensures that the `Turtle` in question is the one on which `moveForward` is invoked when `func()` is called with no object.
+
+## Examples from previous years (Click to go to live demo)
+
+Andrea Lin:
+
+[![](andreaLin.png)](http://andrea-lin.com/Project3-LSystems/)
+
+Ishan Ranade:
+
+[![](ishanRanade.png)](https://ishanranade.github.io/homework-4-l-systems-IshanRanade/)
+
+Joe Klinger:
+
+[![](joeKlinger.png)](https://klingerj.github.io/Project3-LSystems/)
+
+Linshen Xiao:
+
+[![](linshenXiao.png)](https://githublsx.github.io/homework-4-l-systems-githublsx/)
+
+## Useful Resources
+- [The Algorithmic Beauty of Plants](http://algorithmicbotany.org/papers/abop/abop-ch1.pdf)
+- [OpenGL Instanced Rendering (Learn OpenGL)](https://learnopengl.com/Advanced-OpenGL/Instancing)
+- [OpenGL Instanced Rendering (OpenGL-Tutorial)](http://www.opengl-tutorial.org/intermediate-tutorials/billboards-particles/particles-instancing/)
+
+## Extra Credit (Up to 20 points)
+- For bonus points, add functionality to your L-system drawing that ensures geometry will never overlap. In other words, make your plant behave like a real-life plant so that its branches and other components don't compete for the same space. The more complex you make your L-system self-interaction, the more
+points you'll earn.
+- Any additional visual polish you add to your L-System will count towards extra credit, at your grader's discretion. For example, you could add animation of the leaves or branches in your vertex shader, or add falling leaves or flower petals.
diff --git a/README.md b/README.md
index c1cda32..ac54ae4 100644
--- a/README.md
+++ b/README.md
@@ -1,130 +1,9 @@
-# Homework 4: L-systems
 
-For this assignment, you will design a set of formal grammar rules to create
-a plant life using an L-system program. Once again, you will work from a
-TypeScript / WebGL 2.0 base code like the one you used in homework 0. You will
-implement your own set of classes to handle the L-system grammar expansion and
-drawing. You will rasterize your L-system using faceted geometry. Feel free
-to use ray marching to generate an interesting background, but trying to
-raymarch an entire L-system will take too long to render!
 
-## Base Code
-The provided code is very similar to that of homework 1, with the same camera and GUI layout. Additionally, we have provided you with a `Mesh` class that, given a filepath, will construct VBOs describing the vertex positions, normals, colors, uvs, and indices for any `.obj` file. The provided code also uses instanced rendering to draw a single square 10,000 times at different locations and with different colors; refer to the Assignment Requirements section for more details on instanced rendering. Farther down this README, we have also provided some example code snippets for setting up hash map structures in TypeScript.
+## Halloween Tree:
+![screenshot](halloweenTree.JPG)
+PennKey: effieli  
+Name: Effie Li
+Link: https://effieyanfei.github.io/hw04-l-systems/  
+I was inspired by Halloween and created a tree with sprial monster-like branches. The leaves are towards the tip of the branches, increasing based on how close it is to the tip. There are also bats hanging from the branches when you incrase the iteration. Users can control the number of iteration, the scale of the leaves, and the color of the leaves and the base of the trunk. The background is created with fbm noise, and it is animated with time.
 
-## Assignment Requirements
-- __(15 points)__ Create a collection of classes to represent an L-system. You should have at least the following components to make your L-system functional:
-  - A `Turtle` class to represent the current drawing state of your L-System. It should at least keep track of its current position, current orientation, and recursion depth (how many `[` characters have been found while drawing before `]`s)
-  - A stack of `Turtle`s to represent your `Turtle` history. Push a copy of your current `Turtle` onto this when you reach a `[` while drawing, and pop the top `Turtle` from the stack and make it your current `Turtle` when you encounter a `]`. Note that in TypeScript, `push()` and `pop()` operations can be done on regular arrays.
-  - An expandable string of characters to represent your grammar as you iterate on it.
-  - An `ExpansionRule` class to represent the result of mapping a particular character to a new set of characters during the grammar expansion phase of the L-System. By making a class to represent the expansion, you can have a single character expand to multiple possible strings depending on some probability by querying a `Map<string, ExpansionRule>`.
-  - A `DrawingRule` class to represent the result of mapping a character to an L-System drawing operation (possibly with multiple outcomes depending on a probability).
-
-- __(10 points)__ Set up the code in `main.ts` and `ShaderProgram.ts` to pass a collection of transformation data to the GPU to draw your L-System geometric components using __instanced rendering__. We will be using instanced rendering to draw our L-Systems because it is much more efficient to pass a single transformation for each object to be drawn rather than an entire collection of vertices. The provided base code has examples of passing a set of `vec3`s to offset the position of each instanced object, and a set of `vec4`s to change the color of each object. You should at least alter the following via instanced rendering (note that these can be accomplished with a single `mat4`):
-  - Position
-  - Orientation
-  - Scaling
-
-- __(55 points)__ Your L-System scene must have the following attributes:
-  - Your plant must grow in 3D (branches must not just exist in one plane)
-  - Your plant must have flowers, leaves, or some other branch decoration in addition to basic branch geometry
-  - Organic variation (i.e. noise or randomness in grammar expansion and/or drawing operations)
-  - The background should be a colorful backdrop to complement your plant, incorporating some procedural elements.
-  - A flavorful twist. Don't just make a basic variation of the example F[+FX]-FX from the slides! Create a plant that is unique to you. Make an alien tentacle monster plant if you want to! Play around with drawing operations; don't feel compelled to always make your branches straight lines. Curved forms can look quite visually appealing too.
-
-- __(10 points)__ Using dat.GUI, make at least three aspects of your L-System interactive, such as:
-  - The probability thresholds in your grammar expansions
-  - The angle of rotation in various drawing aspects
-  - The size or color or material of the plant components
-  - Anything else in your L-System expansion or drawing you'd like to make modifiable; it doesn't have to be these particular elements
-
-- __(10 points)__ Following the specifications listed
-[here](https://github.com/pjcozzi/Articles/blob/master/CIS565/GitHubRepo/README.md),
-create your own README.md, renaming the file you are presently reading to
-INSTRUCTIONS.md. Don't worry about discussing runtime optimization for this
-project. Make sure your README contains the following information:
-    - Your name and PennKey
-    - Citation of any external resources you found helpful when implementing this
-    assignment.
-    - A link to your live github.io demo (refer to the pinned Piazza post on
-      how to make a live demo through github.io)
-    - An explanation of the techniques you used to generate your L-System features.
-    Please be as detailed as you can; not only will this help you explain your work
-    to recruiters, but it helps us understand your project when we grade it!
-
-## Writing classes and functions in TypeScript
-Example of a basic Turtle class in TypeScript (Turtle.ts)
-```
-import {vec3} from 'gl-matrix';
-
-export default class Turtle {
-  constructor(pos: vec3, orient: vec3) {
-    this.position = pos;
-    this.orientation = orient;
-  }
-
-  moveForward() {
-    add(this.position, this.position, this.orientation * 10.0);
-  }
-}
-```
-Example of a hash map in TypeScript:
-```
-let expansionRules : Map<string, string> = new Map();
-expansionRules.set('A', 'AB');
-expansionRules.set('B', 'A');
-
-console.log(expansionRules.get('A')); // Will print out 'AB'
-console.log(expansionRules.get('C')); // Will print out 'undefined'
-```
-Using functions as map values in TypeScript:
-```
-function moveForward() {...}
-function rotateLeft() {...}
-let drawRules : Map<string, any> = new Map();
-drawRules.set('F', moveForward);
-drawRules.set('+', rotateLeft);
-
-let func = drawRules.get('F');
-if(func) { // Check that the map contains a value for this key
-  func();
-}
-```
-Note that in the above case, the code assumes that all functions stored in the `drawRules` map take in no arguments. If you want to store a class's functions as values in a map, you'll have to refer to a specific instance of a class, e.g.
-```
-let myTurtle: Turtle = new Turtle();
-let drawRules: Map<string, any> = new Map();
-drawRules.set('F', myTurtle.moveForward.bind(myTurtle));
-let func = drawRules.get('F');
-if(func) { // Check that the map contains a value for this key
-  func();
-}
-```
-TypeScript's `bind` operation sets the `this` variable inside the bound function to refer to the object inside `bind`. This ensures that the `Turtle` in question is the one on which `moveForward` is invoked when `func()` is called with no object.
-
-## Examples from previous years (Click to go to live demo)
-
-Andrea Lin:
-
-[![](andreaLin.png)](http://andrea-lin.com/Project3-LSystems/)
-
-Ishan Ranade:
-
-[![](ishanRanade.png)](https://ishanranade.github.io/homework-4-l-systems-IshanRanade/)
-
-Joe Klinger:
-
-[![](joeKlinger.png)](https://klingerj.github.io/Project3-LSystems/)
-
-Linshen Xiao:
-
-[![](linshenXiao.png)](https://githublsx.github.io/homework-4-l-systems-githublsx/)
-
-## Useful Resources
-- [The Algorithmic Beauty of Plants](http://algorithmicbotany.org/papers/abop/abop-ch1.pdf)
-- [OpenGL Instanced Rendering (Learn OpenGL)](https://learnopengl.com/Advanced-OpenGL/Instancing)
-- [OpenGL Instanced Rendering (OpenGL-Tutorial)](http://www.opengl-tutorial.org/intermediate-tutorials/billboards-particles/particles-instancing/)
-
-## Extra Credit (Up to 20 points)
-- For bonus points, add functionality to your L-system drawing that ensures geometry will never overlap. In other words, make your plant behave like a real-life plant so that its branches and other components don't compete for the same space. The more complex you make your L-system self-interaction, the more
-points you'll earn.
-- Any additional visual polish you add to your L-System will count towards extra credit, at your grader's discretion. For example, you could add animation of the leaves or branches in your vertex shader, or add falling leaves or flower petals.
diff --git a/dist/index.html b/dist/index.html
index eba1966..6a82b8a 100644
--- a/dist/index.html
+++ b/dist/index.html
@@ -1,20 +1,22 @@
-<!doctype html>
+
+<!DOCTYPE html>
 <html>
   <head>
-      <title>Project 4: L-Systems | CIS 566</title>
-      <style>
-        html, body {
-          margin: 0;
-          overflow: hidden;
-        }
-        #canvas {
-          width: 100%;
-          height: 100%;
-        }
-      </style>
+    <title>Project 4: L System| CIS 566</title>
+    <style>
+      html,
+      body {
+        margin: 0;
+        overflow: hidden;
+      }
+      #canvas {
+        width: 100%;
+        height: 100%;
+      }
+    </style>
   </head>
   <body>
     <canvas id="canvas"></canvas>
     <script type="text/javascript" src="bundle.js"></script>
   </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/halloweenTree.JPG b/halloweenTree.JPG
new file mode 100644
index 0000000..11eb04c
Binary files /dev/null and b/halloweenTree.JPG differ
diff --git a/package-lock.json b/package-lock.json
index 095aa6c..f370cda 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1743,7 +1743,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1764,12 +1765,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -1784,17 +1787,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1911,7 +1917,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1923,6 +1930,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -1937,6 +1945,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -1944,12 +1953,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -1968,6 +1979,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -2048,7 +2060,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -2060,6 +2073,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -2145,7 +2159,8 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -2181,6 +2196,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -2200,6 +2216,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -2243,12 +2260,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
diff --git a/src/.vscode/launch.json b/src/.vscode/launch.json
new file mode 100644
index 0000000..0469248
--- /dev/null
+++ b/src/.vscode/launch.json
@@ -0,0 +1,15 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "pwa-msedge",
+            "request": "launch",
+            "name": "Launch Edge against localhost",
+            "url": "http://localhost:8080",
+            "webRoot": "${workspaceFolder}"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/src/DrawingRule.ts b/src/DrawingRule.ts
new file mode 100644
index 0000000..c28c6ea
--- /dev/null
+++ b/src/DrawingRule.ts
@@ -0,0 +1,54 @@
+import Turtle from "./Turtle";
+
+export default class DrawingRule{
+    turtle: Turtle;
+    char: string;
+    a: number = 20;
+    isOperation: boolean;
+    isTurn: boolean;
+
+    constructor(st: Turtle, c: string) {
+        this.isTurn = false;
+        this.turtle = st;
+        this.char = c;
+        this.getTurtle();
+        
+    }
+
+    getTurtle() {
+        if(this.char == 'F' || this.char == 'W' || this.char == 'D') {
+            this.turtle.moveForward();
+            this.isOperation = true;
+        }
+        if(this.char == '*') {
+            this.turtle.FBackward(this.a);
+            this.isOperation = true;
+            this.isTurn = true;
+        }
+        if(this.char == '+') {
+            this.turtle.FForward(this.a);
+            this.isOperation = true;
+            this.isTurn = true;
+        }
+        if(this.char == '&') {
+            this.turtle.UForward(this.a);
+            this.isOperation = true;
+            this.isTurn = true;
+        }
+        if(this.char == '^') {
+            this.turtle.UBackward(this.a);
+            this.isOperation = true;
+            this.isTurn = true;
+        }
+        if(this.char == '/') {
+            this.turtle.RBackward(this.a);
+            this.isOperation = true;
+            this.isTurn = true;
+        }
+        if(this.char == '<') {
+            this.turtle.RForward(this.a);
+            this.isOperation = true;
+            this.isTurn = true;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ExpansionRule.ts b/src/ExpansionRule.ts
new file mode 100644
index 0000000..e106ba0
--- /dev/null
+++ b/src/ExpansionRule.ts
@@ -0,0 +1,25 @@
+export default class ExpansionRule{
+    rules: Array<string> = new Array();
+    possibilities: Array<number> = new Array();
+    output : string = "";
+
+    constructor(rules: Array<string>, possibilities: Array<number>) {
+        this.rules = rules;
+        this.possibilities = possibilities;
+        this.output = rules[0];
+    }
+
+    createRule() {
+        var r = Math.random();
+        var idx = 0;
+        var sum = 0;
+        while(r > sum) {
+            sum += this.possibilities[idx];
+            idx += 1;
+        }
+        if(idx >= this.rules.length) {
+            idx = this.rules.length - 1;
+        }
+        this.output = this.rules[idx];
+    }
+}
\ No newline at end of file
diff --git a/src/LSystem.ts b/src/LSystem.ts
new file mode 100644
index 0000000..12be8ce
--- /dev/null
+++ b/src/LSystem.ts
@@ -0,0 +1,188 @@
+import ExpansionRule from './ExpansionRule';
+import DrawingRule from './DrawingRule';
+import Turtle from "./Turtle";
+import {mat4} from 'gl-matrix';
+import {vec4} from 'gl-matrix';
+import { vec3 } from 'gl-matrix';
+import { copyFile } from 'fs';
+import { networkInterfaces } from 'os';
+
+class LSystem {
+    iteration: number = 0;
+    axiom: string = "";
+    rulesExpan: Map<string, ExpansionRule> = new Map();
+    rulesDraw: DrawingRule;
+    fullGrammar: string = "";
+    myTurtle: Turtle = new Turtle(vec4.fromValues(50, 20, 0, 1), vec4.fromValues(0, 1, 0, 0), vec4.fromValues(1, 0, 0, 0), vec4.fromValues(1, 0, 0, 0), 1, 1.8);
+    turtleStack: Array<Turtle> = new Array();
+    angle: number= 10;
+    color: vec3;
+    leafScale: number;
+
+    Btransformations: Array<mat4> = new Array();
+    Bcolors: Array<vec4> = new Array();
+
+    Ytransformations: Array<mat4> = new Array();
+    Ycolors: Array<vec4> = new Array();
+
+    Ltransformations: Array<mat4> = new Array();
+    Lcolors: Array<vec4> = new Array();
+
+    Htransformations: Array<mat4> = new Array();
+    Hcolors: Array<vec4> = new Array();
+
+    Ttransformations: Array<mat4> = new Array();
+    Tcolors: Array<vec4> = new Array();
+    
+
+    constructor(a: string, iter: number, color: vec3, leaf: number) {
+        this.iteration = iter;
+        this.axiom = a;
+        this.color = color;
+        this.leafScale = leaf;
+        this.makeExpansionRules();
+        this.createFullGrammar();
+        this.findTransforms();
+    }
+
+    makeExpansionRules() {
+        var r0 = new ExpansionRule(new Array<string>("[[[[AB]++++BA]+++J"), new Array<number>(1.0));
+        this.rulesExpan.set('J', r0);
+
+        var r1 = new ExpansionRule(new Array<string>("TJ"), new Array<number>(1.0));
+        this.rulesExpan.set('X', r1);
+
+        var r2 = new ExpansionRule(new Array<string>("<<[**L][^^L]FF<<FF<<FF<<HB", "**[^^L][<<L]F**FF**FF**B", "^^[<<L][**L]FF^^FF^^FF^^B"), new Array<number>(0.33, 0.33, 0.33));
+        this.rulesExpan.set('A', r2);
+
+        var r3 = new ExpansionRule(new Array<string>("//[++L][&&L]FF//FF//FF//A", "++[&&L][//L]FF++FF++FF++HA", "&&[//L][++L]FF&&FF&&FF&&A"), new Array<number>(0.33, 0.33, 0.33));
+        this.rulesExpan.set('B', r3);
+
+        var r4 = new ExpansionRule(new Array<string>("FFT"), new Array<number>(1.0));
+        this.rulesExpan.set('T', r4);
+    }
+
+    createFullGrammar() {
+        var current = this.axiom;
+        var count = 0;
+        while(count < this.iteration) {
+            count ++;
+            var idx = 0;
+            var updated = "";
+            while(idx < current.length) {
+                var k = current.substring(idx, idx + 1);
+                if(this.rulesExpan.has(k)){
+                    var r: any = this.rulesExpan.get(k);
+                    r.createRule();
+                    updated += r.output;
+                } else {
+                    updated += k;
+                }
+                idx ++;
+            }
+            current = updated;
+        }
+        this.fullGrammar = current;
+    }
+
+    findTransforms() {
+        var idx = 0;
+        while(idx < this.fullGrammar.length) {
+            var k = this.fullGrammar.substring(idx, idx + 1);
+            this.rulesDraw = new DrawingRule(this.myTurtle, k);
+            this.myTurtle = this.rulesDraw.turtle;
+            if(k == 'F') {
+                var s = 1 - this.myTurtle.scale;
+                var r = 0.2 + (this.color[0] - 0.2) * (s * s);
+                var g = 0.2 + (this.color[1] - 0.2) * (s * s);
+                var b = 0.2 + (this.color[2] - 0.2) * (s * s);
+                var color = vec4.fromValues(r, g, b, 1);
+                this.myTurtle.decreaseScale(0.98);
+                this.Bcolors.push(color);
+                this.Btransformations.push(this.myTurtle.getTransform());
+            }
+            if(this.rulesDraw.isTurn){
+                var r = 0.2 + (this.color[0] - 0.2) * (s * s);
+                var g = 0.2 + (this.color[1] - 0.2) * (s * s);
+                var b = 0.2 + (this.color[2] - 0.2) * (s * s);
+                var color = vec4.fromValues(r, g, b, 1);
+                this.Tcolors.push(color);
+                this.Ttransformations.push(this.myTurtle.getTransform());
+            }
+                
+            if(k == '[') {
+                let d = this.myTurtle.depth;
+                let copy: Turtle = new Turtle(vec4.fromValues(this.myTurtle.pos[0], this.myTurtle.pos[1], this.myTurtle.pos[2], this.myTurtle.pos[3]),
+                vec4.fromValues(this.myTurtle.forward[0], this.myTurtle.forward[1], this.myTurtle.forward[2], this.myTurtle.forward[3]),
+                vec4.fromValues(this.myTurtle.right[0], this.myTurtle.right[1], this.myTurtle.right[2], this.myTurtle.right[3]),
+                vec4.fromValues(this.myTurtle.up[0], this.myTurtle.up[1], this.myTurtle.up[2], this.myTurtle.up[3]),
+                d + 1, this.myTurtle.scale);
+                this.turtleStack.push(copy);
+            }
+            if(k == ']'){
+                let popped: Turtle = this.turtleStack.pop();
+                this.myTurtle = new Turtle(popped.pos, popped.forward, popped.right, popped.up, popped.depth, popped.scale);
+            }
+            if(k == 'L' && this.myTurtle.scale < this.iteration * 0.08) {
+                var color = vec4.fromValues(r, g, b, 1);
+                this.Lcolors.push(color);
+                this.Ltransformations.push(this.myTurtle.getTransformCustomScale(this.leafScale));
+            }
+            if(k == 'H' && this.myTurtle.scale < this.iteration * 0.04) {
+                var color = vec4.fromValues(0, 0, 0, 1);
+                this.Hcolors.push(color);
+                this.Htransformations.push(this.myTurtle.getTranslationMatrix());
+            }
+            idx ++;
+        }
+    }
+
+    getTFloat32Array(arr: Array<mat4>, mode: number): Float32Array {
+        let T = [];
+        var idx = 0;
+        while(idx < arr.length) {
+          var transform: mat4 = arr[idx];
+          if(mode == 1){
+            for(var i = 0; i < 4; i++) {
+                T.push(transform[i]);
+            }
+          }
+          if(mode == 2) {
+            for(var i = 0; i < 4; i++) {
+                T.push(transform[4 + i]);
+            }
+          }
+          if(mode == 3) {
+            for(var i = 0; i < 4; i++) {
+                T.push(transform[8 + i]);
+            }
+          }
+          if(mode == 4) {
+            for(var i = 0; i < 4; i++) {
+                T.push(transform[12 + i]);
+            }
+          }
+          idx ++;
+        }
+        let Tarray: Float32Array = new Float32Array(T);
+        return Tarray;
+    }
+
+    getCFloat32Array(arr: Array<vec4>): Float32Array {
+        var idx = 0;
+        let colorsArray = [];
+        while(idx < arr.length) {
+          var c: vec4 = arr[idx];
+          colorsArray.push(c[0]);
+          colorsArray.push(c[1]);
+          colorsArray.push(c[2]);
+          colorsArray.push(c[3]);
+          idx ++;
+        }
+        let colors: Float32Array = new Float32Array(colorsArray);
+        return colors;
+    }
+
+};
+
+export default LSystem;
\ No newline at end of file
diff --git a/src/Turtle.ts b/src/Turtle.ts
new file mode 100644
index 0000000..9a1befd
--- /dev/null
+++ b/src/Turtle.ts
@@ -0,0 +1,121 @@
+import { glMatrix, vec3, vec4 } from "gl-matrix";
+import { mat4 } from "gl-matrix";
+import { totalmem } from "os";
+
+export default class Turtle {
+    pos: vec4 = vec4.create();
+    depth: number = 0;
+    forward: vec4 = vec4.create();
+    right: vec4 = vec4.create();
+    up: vec4 = vec4.create();
+    scale: number;
+
+    constructor(pos: vec4, f: vec4, r: vec4, u: vec4, d: number, s: number) {
+        this.pos = pos;
+        this.depth = d;
+        this.forward = f;
+        this.right = r;
+        this.up = u;
+        this.scale = s;
+    }
+
+    moveForward() {
+        var step: number = this.scale;
+        this.pos[0] = this.pos[0] + step * this.forward[0];
+        this.pos[1] = this.pos[1] + step * this.forward[1];
+        this.pos[2] = this.pos[2] + step * this.forward[2];
+    }
+
+    FForward(angle: number) {
+        var a = glMatrix.toRadian(angle);
+        var rot = mat4.create();
+        var axis = vec3.fromValues(this.forward[0], this.forward[1], this.forward[2]);
+        mat4.fromRotation(rot, a, axis);
+        vec4.normalize(this.right, vec4.transformMat4(this.right, this.right, rot));
+        vec4.normalize(this.up, vec4.transformMat4(this.up, this.up, rot));
+    }
+
+    FBackward(angle: number) {
+        this.FForward(-1 * angle);
+    }
+
+
+    UForward(angle: number) {
+        var a = glMatrix.toRadian(angle);
+        var rot = mat4.create();
+        var axis = vec3.fromValues(this.up[0], this.up[1], this.up[2]);
+        mat4.fromRotation(rot, a, axis);
+        vec4.normalize(this.right, vec4.transformMat4(this.right, this.right, rot));
+        vec4.normalize(this.forward, vec4.transformMat4(this.forward, this.forward, rot));
+    }
+
+    UBackward(angle: number) {
+        this.UForward(-1 * angle);
+    }
+
+    RForward(angle: number) {
+        var a = glMatrix.toRadian(angle);
+        var rot = mat4.create();
+        var axis = vec3.fromValues(this.right[0], this.right[1], this.right[2]);
+        mat4.fromRotation(rot, a, axis);
+        vec4.normalize(this.up, vec4.transformMat4(this.up, this.up, rot));
+        vec4.normalize(this.forward, vec4.transformMat4(this.forward, this.forward, rot));
+    }
+
+    RBackward(angle: number) {
+        this.RForward(-1 * angle);
+    }
+
+    getRotationMatrix(): mat4 {
+        var originDir: vec3 = vec3.fromValues(0, 1, 0);
+        var forwardDir: vec3 = vec3.fromValues(this.forward[0], this.forward[1], this.forward[2]);
+        var rotAxis = vec3.create();
+        vec3.cross(rotAxis, originDir, forwardDir);
+        var angle = Math.acos(vec3.dot(originDir, forwardDir) / (vec3.length(originDir) * vec3.length(forwardDir)));
+        var rotMatrix = mat4.create();
+        mat4.fromRotation(rotMatrix, angle, rotAxis);
+        return rotMatrix;
+    }
+
+    getTranslationMatrix(): mat4 {
+        var identity = mat4.create();
+        var transMatrix = mat4.create();
+        mat4.identity(identity);
+        mat4.translate(transMatrix, identity, vec3.fromValues(this.pos[0], this.pos[1], this.pos[2]));
+        return transMatrix;
+    }
+
+    decreaseScale(f: number) {
+        this.scale = this.scale * f;
+    }
+
+    getScaleMatrix(): mat4 {
+        var scaleMatrix = mat4.create();
+        let identity = mat4.create();
+        mat4.identity(identity);
+        mat4.scale(scaleMatrix, identity, vec3.fromValues(this.scale, this.scale, this.scale));
+        return scaleMatrix;
+    }
+
+    getScaleMatrixCustom(s: number) : mat4 {
+        var scaleMatrix = mat4.create();
+        let identity = mat4.create();
+        mat4.identity(identity);
+        mat4.scale(scaleMatrix, identity, vec3.fromValues(s, s, s));
+        return scaleMatrix;
+    }
+
+    getTransform(): mat4 {
+        var output = mat4.create();
+        mat4.multiply(output, this.getTranslationMatrix(), this.getRotationMatrix());
+        mat4.multiply(output, output, this.getScaleMatrix());
+        return output;
+    }
+
+    getTransformCustomScale(s: number): mat4 {
+        var output = mat4.create();
+        mat4.multiply(output, this.getTranslationMatrix(), this.getRotationMatrix());
+        mat4.multiply(output, output, this.getScaleMatrixCustom(s));
+        return output;
+    }
+}
\ No newline at end of file
diff --git a/src/bat.obj b/src/bat.obj
new file mode 100644
index 0000000..23d63d3
--- /dev/null
+++ b/src/bat.obj
@@ -0,0 +1,551 @@
+# This file uses centimeters as units for non-parametric coordinates.
+
+mtllib bat.mtl
+g default
+v 0.129359 -0.159253 -0.171852
+v 0.129359 -0.221696 -0.283047
+v 0.129359 -1.000803 -0.342842
+v 0.129359 -1.801216 -0.412088
+v 0.129359 -2.934905 -0.841443
+v 0.129359 -4.020538 -1.216231
+v 0.129359 -5.647404 -1.260170
+v 0.129359 -5.501899 -0.789385
+v 0.129359 -5.685778 -0.345375
+v 0.129359 -5.826259 0.000000
+v 0.129359 -5.685778 0.345375
+v 0.129359 -5.501899 0.789385
+v 0.129359 -5.647404 1.260170
+v 0.129359 -4.020537 1.216231
+v 0.129359 -2.934905 0.841442
+v 0.129359 -1.801217 0.412088
+v 0.129359 -1.000804 0.342842
+v 0.129359 -0.221698 0.283047
+v 0.129359 -0.159254 0.171852
+v 0.129359 -0.018773 -0.000000
+v -0.129359 -0.159253 -0.171852
+v -0.129359 -0.221696 -0.283047
+v -0.129359 -1.000803 -0.342842
+v -0.129359 -1.801216 -0.403035
+v -0.129359 -2.935125 -0.832234
+v -0.129359 -4.020538 -1.216231
+v -0.129359 -5.647404 -1.260170
+v -0.129359 -5.501899 -0.789385
+v -0.129359 -5.685778 -0.345375
+v -0.129359 -5.826259 0.000000
+v -0.129359 -5.685778 0.345375
+v -0.129359 -5.501899 0.789385
+v -0.129359 -5.647404 1.260170
+v -0.129359 -4.020537 1.216231
+v -0.129359 -2.935125 0.832234
+v -0.129359 -1.801217 0.403035
+v -0.129359 -1.000804 0.342842
+v -0.129359 -0.221698 0.283047
+v -0.129359 -0.159254 0.171852
+v -0.129359 -0.018773 -0.000000
+v 0.129359 -2.955993 -0.000000
+v -0.129359 -2.955993 -0.000000
+vt 0.648603 0.107966
+vt 0.626409 0.064408
+vt 0.591842 0.029841
+vt 0.548284 0.007647
+vt 0.500000 -0.000000
+vt 0.451716 0.007647
+vt 0.408159 0.029841
+vt 0.373591 0.064409
+vt 0.351397 0.107966
+vt 0.343750 0.156250
+vt 0.351397 0.204534
+vt 0.373591 0.248091
+vt 0.408159 0.282659
+vt 0.451716 0.304853
+vt 0.500000 0.312500
+vt 0.548284 0.304853
+vt 0.591841 0.282659
+vt 0.626409 0.248091
+vt 0.648603 0.204534
+vt 0.656250 0.156250
+vt 0.375000 0.312500
+vt 0.387500 0.312500
+vt 0.400000 0.312500
+vt 0.412500 0.312500
+vt 0.425000 0.312500
+vt 0.437500 0.312500
+vt 0.450000 0.312500
+vt 0.462500 0.312500
+vt 0.475000 0.312500
+vt 0.487500 0.312500
+vt 0.500000 0.312500
+vt 0.512500 0.312500
+vt 0.525000 0.312500
+vt 0.537500 0.312500
+vt 0.550000 0.312500
+vt 0.562500 0.312500
+vt 0.575000 0.312500
+vt 0.587500 0.312500
+vt 0.600000 0.312500
+vt 0.612500 0.312500
+vt 0.625000 0.312500
+vt 0.375000 0.688440
+vt 0.387500 0.688440
+vt 0.400000 0.688440
+vt 0.412500 0.688440
+vt 0.425000 0.688440
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+vt 0.575000 0.688440
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+vt 0.343750 0.843750
+vt 0.351397 0.892034
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+vt 0.451716 0.992353
+vt 0.500000 1.000000
+vt 0.548284 0.992353
+vt 0.591841 0.970159
+vt 0.626409 0.935591
+vt 0.648603 0.892034
+vt 0.656250 0.843750
+vt 0.500000 0.150000
+vt 0.500000 0.837500
+vn 0.000000 0.812719 -0.582656
+vn 0.000000 0.199116 -0.979976
+vn 0.000000 0.199116 -0.979976
+vn 0.000000 0.812719 -0.582656
+vn -0.008838 0.078584 -0.996868
+vn -0.008838 0.078584 -0.996868
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+vn -0.027130 0.247186 -0.968588
+vn -0.025239 0.342223 -0.939280
+vn -0.025273 0.342274 -0.939260
+vn -0.007096 0.154203 -0.988014
+vn -0.007096 0.154203 -0.988014
+vn -0.000000 -0.276880 -0.960905
+vn -0.000000 -0.276880 -0.960905
+vn -0.000000 -0.999121 -0.041912
+vn -0.000000 -0.999121 -0.041912
+vn -0.000000 -0.924959 -0.380068
+vn -0.000000 -0.924959 -0.380068
+vn 0.000000 -1.000000 0.000000
+vn 0.000000 -1.000000 0.000000
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+vn 0.000000 -0.999121 0.041912
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+vn 0.000000 -0.276879 0.960905
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+vn -0.007096 0.154203 0.988014
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+vn -0.025240 0.342223 0.939280
+vn -0.025274 0.342274 0.939260
+vn -0.027152 0.247550 0.968495
+vn -0.027131 0.247186 0.968588
+vn -0.008838 0.078584 0.996868
+vn -0.008838 0.078584 0.996868
+vn 0.000000 0.199116 0.979976
+vn 0.000000 0.199116 0.979976
+vn 0.000000 0.812716 0.582660
+vn 0.000000 0.812716 0.582660
+vn 0.000000 1.000000 0.000005
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+vn 1.000000 0.000000 0.000000
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+vn 1.000000 0.000000 0.000000
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+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
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+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
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+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+s 1
+g pCylinder1
+usemtl initialShadingGroup
+f 1/21/1 2/22/2 22/43/3 21/42/4
+f 2/22/2 3/23/5 23/44/6 22/43/3
+f 3/23/5 4/24/7 24/45/8 23/44/6
+f 4/24/7 5/25/9 25/46/10 24/45/8
+f 5/25/9 6/26/11 26/47/12 25/46/10
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+f 10/30/19 11/31/21 31/52/22 30/51/20
+f 11/31/21 12/32/23 32/53/24 31/52/22
+f 12/32/23 13/33/25 33/54/26 32/53/24
+f 13/33/25 14/34/27 34/55/28 33/54/26
+f 14/34/27 15/35/29 35/56/30 34/55/28
+f 15/35/29 16/36/31 36/57/32 35/56/30
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+f 17/37/33 18/38/35 38/59/36 37/58/34
+f 18/38/35 19/39/37 39/60/38 38/59/36
+f 19/39/37 20/40/39 40/61/40 39/60/38
+f 20/40/39 1/41/1 21/62/4 40/61/40
+s 2
+f 2/2/41 1/1/42 41/83/43
+f 3/3/44 2/2/41 41/83/43
+f 4/4/45 3/3/44 41/83/43
+f 5/5/46 4/4/45 41/83/43
+f 6/6/47 5/5/46 41/83/43
+f 7/7/48 6/6/47 41/83/43
+f 8/8/49 7/7/48 41/83/43
+f 9/9/50 8/8/49 41/83/43
+f 10/10/51 9/9/50 41/83/43
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+f 19/19/60 18/18/59 41/83/43
+f 20/20/61 19/19/60 41/83/43
+f 1/1/42 20/20/61 41/83/43
+s 3
+f 21/81/62 22/80/63 42/84/64
+f 22/80/63 23/79/65 42/84/64
+f 23/79/65 24/78/66 42/84/64
+f 24/78/66 25/77/67 42/84/64
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+f 32/70/74 33/69/75 42/84/64
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+f 37/65/79 38/64/80 42/84/64
+f 38/64/80 39/63/81 42/84/64
+f 39/63/81 40/82/82 42/84/64
+f 40/82/82 21/81/62 42/84/64
+g default
+v 0.145482 -5.621302 -0.141705
+v 0.145482 -5.623792 -0.269539
+v 0.145482 -5.680256 -0.389456
+v 0.145482 -5.836042 -0.513657
+v 0.145482 -6.057429 -0.590639
+v 0.145482 -6.464421 -0.573456
+v 0.145482 -7.163419 -0.794295
+v 0.145482 -6.814373 -0.482555
+v 0.145482 -6.733751 -0.217209
+v 0.145482 -6.793560 -0.000000
+v 0.145482 -6.733751 0.217209
+v 0.145482 -6.814373 0.482555
+v 0.145482 -7.163419 0.794295
+v 0.145482 -6.464421 0.573456
+v 0.145482 -6.057429 0.590638
+v 0.145482 -5.836042 0.513656
+v 0.145482 -5.680257 0.389455
+v 0.145482 -5.623793 0.269538
+v 0.145482 -5.621302 0.141705
+v 0.145482 -5.659132 -0.000000
+v -0.145482 -5.621302 -0.141705
+v -0.145482 -5.623792 -0.269539
+v -0.145482 -5.680256 -0.389456
+v -0.145482 -5.836042 -0.513657
+v -0.145482 -6.057429 -0.590639
+v -0.145482 -6.464421 -0.573456
+v -0.145482 -7.163419 -0.794295
+v -0.145482 -6.814373 -0.482555
+v -0.145482 -6.733751 -0.217209
+v -0.145482 -6.793560 -0.000000
+v -0.145482 -6.733751 0.217209
+v -0.145482 -6.814373 0.482555
+v -0.145482 -7.163419 0.794295
+v -0.145482 -6.464421 0.573456
+v -0.145482 -6.057429 0.590638
+v -0.145482 -5.836042 0.513656
+v -0.145482 -5.680257 0.389455
+v -0.145482 -5.623793 0.269538
+v -0.145482 -5.621302 0.141705
+v -0.145482 -5.659132 -0.000000
+v 0.145482 -6.067506 -0.000000
+v -0.145482 -6.067506 -0.000000
+vt 0.648603 0.107966
+vt 0.626409 0.064408
+vt 0.591842 0.029841
+vt 0.548284 0.007647
+vt 0.500000 -0.000000
+vt 0.451716 0.007647
+vt 0.408159 0.029841
+vt 0.373591 0.064409
+vt 0.351397 0.107966
+vt 0.343750 0.156250
+vt 0.351397 0.204534
+vt 0.373591 0.248091
+vt 0.408159 0.282659
+vt 0.451716 0.304853
+vt 0.500000 0.312500
+vt 0.548284 0.304853
+vt 0.591841 0.282659
+vt 0.626409 0.248091
+vt 0.648603 0.204534
+vt 0.656250 0.156250
+vt 0.375000 0.312500
+vt 0.387500 0.312500
+vt 0.400000 0.312500
+vt 0.412500 0.312500
+vt 0.425000 0.312500
+vt 0.437500 0.312500
+vt 0.450000 0.312500
+vt 0.462500 0.312500
+vt 0.475000 0.312500
+vt 0.487500 0.312500
+vt 0.500000 0.312500
+vt 0.512500 0.312500
+vt 0.525000 0.312500
+vt 0.537500 0.312500
+vt 0.550000 0.312500
+vt 0.562500 0.312500
+vt 0.575000 0.312500
+vt 0.587500 0.312500
+vt 0.600000 0.312500
+vt 0.612500 0.312500
+vt 0.625000 0.312500
+vt 0.375000 0.688440
+vt 0.387500 0.688440
+vt 0.400000 0.688440
+vt 0.412500 0.688440
+vt 0.425000 0.688440
+vt 0.437500 0.688440
+vt 0.450000 0.688440
+vt 0.462500 0.688440
+vt 0.475000 0.688440
+vt 0.487500 0.688440
+vt 0.500000 0.688440
+vt 0.512500 0.688440
+vt 0.525000 0.688440
+vt 0.537500 0.688440
+vt 0.550000 0.688440
+vt 0.562500 0.688440
+vt 0.575000 0.688440
+vt 0.587500 0.688440
+vt 0.600000 0.688440
+vt 0.612500 0.688440
+vt 0.625000 0.688440
+vt 0.648603 0.795466
+vt 0.626409 0.751908
+vt 0.591842 0.717341
+vt 0.548284 0.695147
+vt 0.500000 0.687500
+vt 0.451716 0.695147
+vt 0.408159 0.717341
+vt 0.373591 0.751909
+vt 0.351397 0.795466
+vt 0.343750 0.843750
+vt 0.351397 0.892034
+vt 0.373591 0.935591
+vt 0.408159 0.970159
+vt 0.451716 0.992353
+vt 0.500000 1.000000
+vt 0.548284 0.992353
+vt 0.591841 0.970159
+vt 0.626409 0.935591
+vt 0.648603 0.892034
+vt 0.656250 0.843750
+vt 0.500000 0.150000
+vt 0.500000 0.837500
+vn 0.000000 0.991514 0.130001
+vn 0.000000 0.972836 -0.231494
+vn 0.000000 0.972836 -0.231494
+vn 0.000000 0.991514 0.130001
+vn 0.000000 0.754647 -0.656131
+vn 0.000000 0.754647 -0.656131
+vn 0.000000 0.470633 -0.882329
+vn 0.000000 0.470633 -0.882329
+vn 0.000000 0.094737 -0.995502
+vn 0.000000 0.094737 -0.995502
+vn 0.000000 0.181095 -0.983466
+vn 0.000000 0.181095 -0.983466
+vn -0.000000 -0.251410 -0.967881
+vn -0.000000 -0.251410 -0.967881
+vn 0.000000 -0.802094 0.597198
+vn 0.000000 -0.802094 0.597198
+vn 0.000000 -0.999071 0.043092
+vn 0.000000 -0.999071 0.043092
+vn -0.000000 -1.000000 -0.000000
+vn -0.000000 -1.000000 -0.000000
+vn -0.000000 -0.999071 -0.043092
+vn -0.000000 -0.999071 -0.043092
+vn -0.000000 -0.802094 -0.597198
+vn -0.000000 -0.802094 -0.597198
+vn 0.000000 -0.251410 0.967881
+vn 0.000000 -0.251410 0.967881
+vn 0.000000 0.181095 0.983466
+vn 0.000000 0.181095 0.983466
+vn 0.000000 0.094737 0.995502
+vn 0.000000 0.094737 0.995502
+vn 0.000000 0.470633 0.882329
+vn 0.000000 0.470633 0.882329
+vn 0.000000 0.754647 0.656131
+vn 0.000000 0.754647 0.656131
+vn 0.000000 0.972836 0.231494
+vn 0.000000 0.972836 0.231494
+vn 0.000000 0.991514 -0.129999
+vn 0.000000 0.991514 -0.129999
+vn 0.000000 1.000000 0.000001
+vn 0.000000 1.000000 0.000001
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 -0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 -0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 -0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 -0.000000
+vn -1.000000 0.000000 -0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 -0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+s 1
+g pCylinder2
+usemtl initialShadingGroup
+f 43/105/83 44/106/84 64/127/85 63/126/86
+f 44/106/84 45/107/87 65/128/88 64/127/85
+f 45/107/87 46/108/89 66/129/90 65/128/88
+f 46/108/89 47/109/91 67/130/92 66/129/90
+f 47/109/91 48/110/93 68/131/94 67/130/92
+f 48/110/93 49/111/95 69/132/96 68/131/94
+f 49/111/95 50/112/97 70/133/98 69/132/96
+f 50/112/97 51/113/99 71/134/100 70/133/98
+f 51/113/99 52/114/101 72/135/102 71/134/100
+f 52/114/101 53/115/103 73/136/104 72/135/102
+f 53/115/103 54/116/105 74/137/106 73/136/104
+f 54/116/105 55/117/107 75/138/108 74/137/106
+f 55/117/107 56/118/109 76/139/110 75/138/108
+f 56/118/109 57/119/111 77/140/112 76/139/110
+f 57/119/111 58/120/113 78/141/114 77/140/112
+f 58/120/113 59/121/115 79/142/116 78/141/114
+f 59/121/115 60/122/117 80/143/118 79/142/116
+f 60/122/117 61/123/119 81/144/120 80/143/118
+f 61/123/119 62/124/121 82/145/122 81/144/120
+f 62/124/121 43/125/83 63/146/86 82/145/122
+s 2
+f 44/86/123 43/85/124 83/167/125
+f 45/87/126 44/86/123 83/167/125
+f 46/88/127 45/87/126 83/167/125
+f 47/89/128 46/88/127 83/167/125
+f 48/90/129 47/89/128 83/167/125
+f 49/91/130 48/90/129 83/167/125
+f 50/92/131 49/91/130 83/167/125
+f 51/93/132 50/92/131 83/167/125
+f 52/94/133 51/93/132 83/167/125
+f 53/95/134 52/94/133 83/167/125
+f 54/96/135 53/95/134 83/167/125
+f 55/97/136 54/96/135 83/167/125
+f 56/98/137 55/97/136 83/167/125
+f 57/99/138 56/98/137 83/167/125
+f 58/100/139 57/99/138 83/167/125
+f 59/101/140 58/100/139 83/167/125
+f 60/102/141 59/101/140 83/167/125
+f 61/103/142 60/102/141 83/167/125
+f 62/104/143 61/103/142 83/167/125
+f 43/85/124 62/104/143 83/167/125
+s 3
+f 63/165/144 64/164/145 84/168/146
+f 64/164/145 65/163/147 84/168/146
+f 65/163/147 66/162/148 84/168/146
+f 66/162/148 67/161/149 84/168/146
+f 67/161/149 68/160/150 84/168/146
+f 68/160/150 69/159/151 84/168/146
+f 69/159/151 70/158/152 84/168/146
+f 70/158/152 71/157/153 84/168/146
+f 71/157/153 72/156/154 84/168/146
+f 72/156/154 73/155/155 84/168/146
+f 73/155/155 74/154/156 84/168/146
+f 74/154/156 75/153/157 84/168/146
+f 75/153/157 76/152/158 84/168/146
+f 76/152/158 77/151/159 84/168/146
+f 77/151/159 78/150/160 84/168/146
+f 78/150/160 79/149/161 84/168/146
+f 79/149/161 80/148/162 84/168/146
+f 80/148/162 81/147/163 84/168/146
+f 81/147/163 82/166/164 84/168/146
+f 82/166/164 63/165/144 84/168/146
diff --git a/src/cube.obj b/src/cube.obj
new file mode 100644
index 0000000..75c937a
--- /dev/null
+++ b/src/cube.obj
@@ -0,0 +1,59 @@
+# This file uses centimeters as units for non-parametric coordinates.
+
+mtllib cube.mtl
+g default
+v -0.500000 -0.500000 0.500000
+v 0.500000 -0.500000 0.500000
+v -0.500000 0.500000 0.500000
+v 0.500000 0.500000 0.500000
+v -0.500000 0.500000 -0.500000
+v 0.500000 0.500000 -0.500000
+v -0.500000 -0.500000 -0.500000
+v 0.500000 -0.500000 -0.500000
+vt 0.375000 0.000000
+vt 0.625000 0.000000
+vt 0.375000 0.250000
+vt 0.625000 0.250000
+vt 0.375000 0.500000
+vt 0.625000 0.500000
+vt 0.375000 0.750000
+vt 0.625000 0.750000
+vt 0.375000 1.000000
+vt 0.625000 1.000000
+vt 0.875000 0.000000
+vt 0.875000 0.250000
+vt 0.125000 0.000000
+vt 0.125000 0.250000
+vn 0.000000 0.000000 1.000000
+vn 0.000000 0.000000 1.000000
+vn 0.000000 0.000000 1.000000
+vn 0.000000 0.000000 1.000000
+vn 0.000000 1.000000 0.000000
+vn 0.000000 1.000000 0.000000
+vn 0.000000 1.000000 0.000000
+vn 0.000000 1.000000 0.000000
+vn 0.000000 0.000000 -1.000000
+vn 0.000000 0.000000 -1.000000
+vn 0.000000 0.000000 -1.000000
+vn 0.000000 0.000000 -1.000000
+vn 0.000000 -1.000000 0.000000
+vn 0.000000 -1.000000 0.000000
+vn 0.000000 -1.000000 0.000000
+vn 0.000000 -1.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+s off
+g pCube1
+usemtl initialShadingGroup
+f 1/1/1 2/2/2 4/4/3 3/3/4
+f 3/3/5 4/4/6 6/6/7 5/5/8
+f 5/5/9 6/6/10 8/8/11 7/7/12
+f 7/7/13 8/8/14 2/10/15 1/9/16
+f 2/2/17 8/11/18 6/12/19 4/4/20
+f 7/13/21 1/1/22 3/3/23 5/14/24
diff --git a/src/geometry/Cube.ts b/src/geometry/Cube.ts
new file mode 100644
index 0000000..fa45161
--- /dev/null
+++ b/src/geometry/Cube.ts
@@ -0,0 +1,103 @@
+import {vec3, vec4} from 'gl-matrix';
+import Drawable from '../rendering/gl/Drawable';
+import {gl} from '../globals';
+
+class Cube extends Drawable {
+  indices: Uint32Array;
+  positions: Float32Array;
+  normals: Float32Array;
+  center: vec4;
+
+  constructor(center: vec3) {
+    super(); // Call the constructor of the super class. This is required.
+    this.center = vec4.fromValues(center[0], center[1], center[2], 1);
+  }
+
+  create() {
+
+  this.indices = new Uint32Array([0, 1, 2,
+                                  0, 2, 3, 
+      4, 5, 6,
+      4, 6, 7,
+      8, 9, 10,
+      8, 10, 11,
+      12, 13, 14,
+      12, 14, 15,
+      16, 17, 18,
+      16, 18, 19,
+      20, 21, 22,
+      20, 22, 23
+  ]);
+  this.normals = new Float32Array([0, 0, 1, 0,
+                                   0, 0, 1, 0,
+                                   0, 0, 1, 0,
+                                   0, 0, 1, 0,
+      0, 1, 0, 0,
+      0, 1, 0, 0,
+      0, 1, 0, 0,
+      0, 1, 0, 0,
+      0, 0, 1, 0,
+      0, 0, 1, 0,
+      0, 0, 1, 0,
+      0, 0, 1, 0,
+      0, 1, 0, 0,
+      0, 1, 0, 0,
+      0, 1, 0, 0,
+      0, 1, 0, 0,
+      1, 0, 0, 0,
+      1, 0, 0, 0,
+      1, 0, 0, 0,
+      1, 0, 0, 0,
+      1, 0, 0, 0,
+      1, 0, 0, 0,
+      1, 0, 0, 0,
+      1, 0, 0, 0
+  ]);
+  this.positions = new Float32Array([-1, -1, 1, 1,
+                                     1, -1, 1, 1,
+                                     1, 1, 1, 1,
+                                     -1, 1, 1, 1,
+      -1, 1, 1, 1,
+      1, 1, 1, 1,
+      1, 1, -1, 1,
+      -1, 1, -1, 1,
+
+      -1, -1, -1, 1,
+      1, -1, -1, 1,
+      1, 1, -1, 1,
+      -1, 1, -1, 1,
+      -1, -1, 1, 1,
+      1, -1, 1, 1,
+      1, -1, -1, 1,
+      -1, -1, -1, 1,
+      
+      -1, -1, -1, 1,
+      -1, -1, 1, 1,
+      -1, 1, 1, 1,
+      -1, 1, -1, 1,
+
+      1, -1, -1, 1, 
+      1, -1, 1, 1, 
+      1, 1, 1, 1,
+      1, 1, -1, 1
+  ]);
+
+    this.generateIdx();
+    this.generatePos();
+    this.generateNor();
+
+    this.count = this.indices.length;
+    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.bufIdx);
+    gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, this.indices, gl.STATIC_DRAW);
+
+    gl.bindBuffer(gl.ARRAY_BUFFER, this.bufNor);
+    gl.bufferData(gl.ARRAY_BUFFER, this.normals, gl.STATIC_DRAW);
+
+    gl.bindBuffer(gl.ARRAY_BUFFER, this.bufPos);
+    gl.bufferData(gl.ARRAY_BUFFER, this.positions, gl.STATIC_DRAW);
+
+    console.log(`Created cube`);
+  }
+};
+
+export default Cube;
diff --git a/src/geometry/Mesh.ts b/src/geometry/Mesh.ts
index c5591ce..79f27ba 100644
--- a/src/geometry/Mesh.ts
+++ b/src/geometry/Mesh.ts
@@ -8,8 +8,13 @@ class Mesh extends Drawable {
   positions: Float32Array;
   normals: Float32Array;
   colors: Float32Array;
+  offsets: Float32Array;
   uvs: Float32Array;
   center: vec4;
+  T1: Float32Array;
+  T2: Float32Array;
+  T3: Float32Array;
+  T4: Float32Array;
 
   objString: string;
 
@@ -43,10 +48,10 @@ class Mesh extends Drawable {
     idxTemp = loadedMesh.indices;
 
     // white vert color for now
-    this.colors = new Float32Array(posTemp.length);
-    for (var i = 0; i < posTemp.length; ++i){
-      this.colors[i] = 1.0;
-    }
+    //this.colors = new Float32Array(posTemp.length);
+    //for (var i = 0; i < posTemp.length; ++i){
+    //  this.colors[i] = 1.0;
+    //}
 
     this.indices = new Uint32Array(idxTemp);
     this.normals = new Float32Array(norTemp);
@@ -58,6 +63,11 @@ class Mesh extends Drawable {
     this.generateNor();
     this.generateUV();
     this.generateCol();
+    this.generateTranslate();
+    this.generateT1();
+    this.generateT2();
+    this.generateT3();
+    this.generateT4();
 
     this.count = this.indices.length;
     gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.bufIdx);
@@ -69,8 +79,8 @@ class Mesh extends Drawable {
     gl.bindBuffer(gl.ARRAY_BUFFER, this.bufPos);
     gl.bufferData(gl.ARRAY_BUFFER, this.positions, gl.STATIC_DRAW);
 
-    gl.bindBuffer(gl.ARRAY_BUFFER, this.bufCol);
-    gl.bufferData(gl.ARRAY_BUFFER, this.colors, gl.STATIC_DRAW);
+    //gl.bindBuffer(gl.ARRAY_BUFFER, this.bufCol);
+    //gl.bufferData(gl.ARRAY_BUFFER, this.colors, gl.STATIC_DRAW);
 
     gl.bindBuffer(gl.ARRAY_BUFFER, this.bufUV);
     gl.bufferData(gl.ARRAY_BUFFER, this.uvs, gl.STATIC_DRAW);
@@ -78,6 +88,25 @@ class Mesh extends Drawable {
     console.log(`Created Mesh from OBJ`);
     this.objString = ""; // hacky clear
   }
+
+  setInstanceVBOs(T1: Float32Array, T2: Float32Array, T3: Float32Array, T4: Float32Array, colors: Float32Array) {
+    this.colors = colors;
+    this.T1 = T1;
+    this.T2 = T2;
+    this.T3 = T3;
+    this.T4 = T4;
+
+    gl.bindBuffer(gl.ARRAY_BUFFER, this.bufCol);
+    gl.bufferData(gl.ARRAY_BUFFER, this.colors, gl.STATIC_DRAW);
+    gl.bindBuffer(gl.ARRAY_BUFFER, this.bufT1);
+    gl.bufferData(gl.ARRAY_BUFFER, this.T1, gl.STATIC_DRAW);
+    gl.bindBuffer(gl.ARRAY_BUFFER, this.bufT2);
+    gl.bufferData(gl.ARRAY_BUFFER, this.T2, gl.STATIC_DRAW);
+    gl.bindBuffer(gl.ARRAY_BUFFER, this.bufT3);
+    gl.bufferData(gl.ARRAY_BUFFER, this.T3, gl.STATIC_DRAW);
+    gl.bindBuffer(gl.ARRAY_BUFFER, this.bufT4);
+    gl.bufferData(gl.ARRAY_BUFFER, this.T4, gl.STATIC_DRAW);
+  }
 };
 
 export default Mesh;
diff --git a/src/leaf.obj b/src/leaf.obj
new file mode 100644
index 0000000..72c1106
--- /dev/null
+++ b/src/leaf.obj
@@ -0,0 +1,277 @@
+# This file uses centimeters as units for non-parametric coordinates.
+
+mtllib leaf.mtl
+g default
+v 0.119980 7.470734 -0.309017
+v 0.119980 6.526162 -0.642524
+v 0.119980 5.612993 -1.082292
+v 0.119980 5.698362 -2.039852
+v 0.119980 3.337849 -1.299343
+v 0.119980 2.068549 -0.951057
+v 0.119980 1.245116 -0.809017
+v 0.119980 0.591636 -0.587785
+v 0.119980 0.172076 -0.309017
+v 0.119980 0.027506 0.000000
+v 0.119980 0.172076 0.309017
+v 0.119980 0.591636 0.587785
+v 0.119980 1.245116 0.809017
+v 0.119980 2.068549 0.951057
+v 0.119980 3.337849 1.299343
+v 0.119980 5.698362 2.039852
+v 0.119980 5.612992 1.082291
+v 0.119980 6.526161 0.642524
+v 0.119980 7.470732 0.309017
+v 0.119980 7.734311 0.000000
+v -0.119980 7.470734 -0.309017
+v -0.119980 6.526162 -0.642524
+v -0.119980 5.612993 -1.082292
+v -0.119980 5.698362 -2.039852
+v -0.119980 3.337849 -1.299343
+v -0.119980 2.068549 -0.951057
+v -0.119980 1.245116 -0.809017
+v -0.119980 0.591636 -0.587785
+v -0.119980 0.172076 -0.309017
+v -0.119980 0.027506 0.000000
+v -0.119980 0.172076 0.309017
+v -0.119980 0.591636 0.587785
+v -0.119980 1.245116 0.809017
+v -0.119980 2.068549 0.951057
+v -0.119980 3.337849 1.299343
+v -0.119980 5.698362 2.039852
+v -0.119980 5.612992 1.082292
+v -0.119980 6.526161 0.642524
+v -0.119980 7.470732 0.309017
+v -0.119980 7.734311 0.000000
+v 0.119980 3.004597 0.000000
+v -0.119980 3.004597 0.000000
+vt 0.648603 0.107966
+vt 0.626409 0.064408
+vt 0.591842 0.029841
+vt 0.548284 0.007647
+vt 0.500000 -0.000000
+vt 0.451716 0.007647
+vt 0.408159 0.029841
+vt 0.373591 0.064409
+vt 0.351397 0.107966
+vt 0.343750 0.156250
+vt 0.351397 0.204534
+vt 0.373591 0.248091
+vt 0.408159 0.282659
+vt 0.451716 0.304853
+vt 0.500000 0.312500
+vt 0.548284 0.304853
+vt 0.591841 0.282659
+vt 0.626409 0.248091
+vt 0.648603 0.204534
+vt 0.656250 0.156250
+vt 0.375000 0.312500
+vt 0.387500 0.312500
+vt 0.400000 0.312500
+vt 0.412500 0.312500
+vt 0.425000 0.312500
+vt 0.437500 0.312500
+vt 0.450000 0.312500
+vt 0.462500 0.312500
+vt 0.475000 0.312500
+vt 0.487500 0.312500
+vt 0.500000 0.312500
+vt 0.512500 0.312500
+vt 0.525000 0.312500
+vt 0.537500 0.312500
+vt 0.550000 0.312500
+vt 0.562500 0.312500
+vt 0.575000 0.312500
+vt 0.587500 0.312500
+vt 0.600000 0.312500
+vt 0.612500 0.312500
+vt 0.625000 0.312500
+vt 0.375000 0.688440
+vt 0.387500 0.688440
+vt 0.400000 0.688440
+vt 0.412500 0.688440
+vt 0.425000 0.688440
+vt 0.437500 0.688440
+vt 0.450000 0.688440
+vt 0.462500 0.688440
+vt 0.475000 0.688440
+vt 0.487500 0.688440
+vt 0.500000 0.688440
+vt 0.512500 0.688440
+vt 0.525000 0.688440
+vt 0.537500 0.688440
+vt 0.550000 0.688440
+vt 0.562500 0.688440
+vt 0.575000 0.688440
+vt 0.587500 0.688440
+vt 0.600000 0.688440
+vt 0.612500 0.688440
+vt 0.625000 0.688440
+vt 0.648603 0.795466
+vt 0.626409 0.751908
+vt 0.591842 0.717341
+vt 0.548284 0.695147
+vt 0.500000 0.687500
+vt 0.451716 0.695147
+vt 0.408159 0.717341
+vt 0.373591 0.751909
+vt 0.351397 0.795466
+vt 0.343750 0.843750
+vt 0.351397 0.892034
+vt 0.373591 0.935591
+vt 0.408159 0.970159
+vt 0.451716 0.992353
+vt 0.500000 1.000000
+vt 0.548284 0.992353
+vt 0.591841 0.970159
+vt 0.626409 0.935591
+vt 0.648603 0.892034
+vt 0.656250 0.843750
+vt 0.500000 0.150000
+vt 0.500000 0.837500
+vn 0.000000 0.469552 -0.882905
+vn 0.000000 0.384283 -0.923215
+vn 0.000000 0.384283 -0.923215
+vn 0.000000 0.469552 -0.882905
+vn -0.000000 0.860358 -0.509690
+vn -0.000000 0.860358 -0.509690
+vn 0.000000 0.094970 -0.995480
+vn 0.000000 0.094970 -0.995480
+vn 0.000000 -0.287312 -0.957837
+vn 0.000000 -0.287312 -0.957837
+vn -0.000000 -0.228121 -0.973633
+vn -0.000000 -0.228121 -0.973633
+vn -0.000000 -0.238848 -0.971057
+vn -0.000000 -0.238848 -0.971057
+vn -0.000000 -0.422364 -0.906426
+vn -0.000000 -0.422364 -0.906426
+vn -0.000000 -0.721475 -0.692440
+vn -0.000000 -0.721475 -0.692440
+vn 0.000000 -1.000000 0.000000
+vn 0.000000 -1.000000 0.000000
+vn 0.000000 -0.721475 0.692440
+vn 0.000000 -0.721475 0.692440
+vn 0.000000 -0.422364 0.906426
+vn 0.000000 -0.422364 0.906426
+vn 0.000000 -0.238848 0.971057
+vn 0.000000 -0.238848 0.971057
+vn 0.000000 -0.228121 0.973633
+vn 0.000000 -0.228121 0.973633
+vn 0.000000 -0.287312 0.957837
+vn 0.000000 -0.287312 0.957837
+vn 0.000001 0.094970 0.995480
+vn 0.000001 0.094970 0.995480
+vn 0.000001 0.860358 0.509690
+vn 0.000001 0.860358 0.509690
+vn 0.000000 0.384283 0.923215
+vn 0.000000 0.384283 0.923215
+vn 0.000000 0.469551 0.882905
+vn 0.000000 0.469551 0.882905
+vn 0.000000 1.000000 0.000003
+vn 0.000000 1.000000 0.000003
+vn 1.000000 -0.000000 -0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 -0.000000
+vn 1.000000 0.000000 -0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 -0.000000 0.000000
+vn 1.000000 -0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 -0.000000
+vn -1.000000 -0.000000 -0.000000
+vn -1.000000 0.000000 -0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 -0.000000 0.000000
+vn -1.000000 -0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+s 1
+g pCylinder1
+usemtl initialShadingGroup
+f 1/21/1 2/22/2 22/43/3 21/42/4
+f 2/22/2 3/23/5 23/44/6 22/43/3
+f 3/23/5 4/24/7 24/45/8 23/44/6
+f 4/24/7 5/25/9 25/46/10 24/45/8
+f 5/25/9 6/26/11 26/47/12 25/46/10
+f 6/26/11 7/27/13 27/48/14 26/47/12
+f 7/27/13 8/28/15 28/49/16 27/48/14
+f 8/28/15 9/29/17 29/50/18 28/49/16
+f 9/29/17 10/30/19 30/51/20 29/50/18
+f 10/30/19 11/31/21 31/52/22 30/51/20
+f 11/31/21 12/32/23 32/53/24 31/52/22
+f 12/32/23 13/33/25 33/54/26 32/53/24
+f 13/33/25 14/34/27 34/55/28 33/54/26
+f 14/34/27 15/35/29 35/56/30 34/55/28
+f 15/35/29 16/36/31 36/57/32 35/56/30
+f 16/36/31 17/37/33 37/58/34 36/57/32
+f 17/37/33 18/38/35 38/59/36 37/58/34
+f 18/38/35 19/39/37 39/60/38 38/59/36
+f 19/39/37 20/40/39 40/61/40 39/60/38
+f 20/40/39 1/41/1 21/62/4 40/61/40
+s 2
+f 2/2/41 1/1/42 41/83/43
+f 3/3/44 2/2/41 41/83/43
+f 4/4/45 3/3/44 41/83/43
+f 5/5/46 4/4/45 41/83/43
+f 6/6/47 5/5/46 41/83/43
+f 7/7/48 6/6/47 41/83/43
+f 8/8/49 7/7/48 41/83/43
+f 9/9/50 8/8/49 41/83/43
+f 10/10/51 9/9/50 41/83/43
+f 11/11/52 10/10/51 41/83/43
+f 12/12/53 11/11/52 41/83/43
+f 13/13/54 12/12/53 41/83/43
+f 14/14/55 13/13/54 41/83/43
+f 15/15/56 14/14/55 41/83/43
+f 16/16/57 15/15/56 41/83/43
+f 17/17/58 16/16/57 41/83/43
+f 18/18/59 17/17/58 41/83/43
+f 19/19/60 18/18/59 41/83/43
+f 20/20/61 19/19/60 41/83/43
+f 1/1/42 20/20/61 41/83/43
+s 3
+f 21/81/62 22/80/63 42/84/64
+f 22/80/63 23/79/65 42/84/64
+f 23/79/65 24/78/66 42/84/64
+f 24/78/66 25/77/67 42/84/64
+f 25/77/67 26/76/68 42/84/64
+f 26/76/68 27/75/69 42/84/64
+f 27/75/69 28/74/70 42/84/64
+f 28/74/70 29/73/71 42/84/64
+f 29/73/71 30/72/72 42/84/64
+f 30/72/72 31/71/73 42/84/64
+f 31/71/73 32/70/74 42/84/64
+f 32/70/74 33/69/75 42/84/64
+f 33/69/75 34/68/76 42/84/64
+f 34/68/76 35/67/77 42/84/64
+f 35/67/77 36/66/78 42/84/64
+f 36/66/78 37/65/79 42/84/64
+f 37/65/79 38/64/80 42/84/64
+f 38/64/80 39/63/81 42/84/64
+f 39/63/81 40/82/82 42/84/64
+f 40/82/82 21/81/62 42/84/64
diff --git a/src/main.ts b/src/main.ts
index 932c78f..18e13e9 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,4 +1,5 @@
-import {vec3} from 'gl-matrix';
+import {vec3, vec4} from 'gl-matrix';
+import {mat4} from 'gl-matrix';
 import * as Stats from 'stats-js';
 import * as DAT from 'dat-gui';
 import Square from './geometry/Square';
@@ -7,19 +8,72 @@ import OpenGLRenderer from './rendering/gl/OpenGLRenderer';
 import Camera from './Camera';
 import {setGL} from './globals';
 import ShaderProgram, {Shader} from './rendering/gl/ShaderProgram';
-
+import Mesh from './geometry/Mesh';
+import LSystem from './LSystem';
 // Define an object with application parameters and button callbacks
 // This will be referred to by dat.GUI's functions that add GUI elements.
 const controls = {
+  iteration: 8,
+  'Reload': reload, // A function pointer, essentially
+  leafScale: 0.5,
+};
+var palette = {
+  leaf: [255, 94, 0], // RGB array
 };
 
+let r: number = 255;
+let g: number = 94;
+let leafScale = 0.5;
+let b: number = 0;
+let prevIteratoin: number = 8;
 let square: Square;
+let branch: Mesh;
+let turn: Mesh;
+let leaf: Mesh;
+let bat: Mesh;
 let screenQuad: ScreenQuad;
 let time: number = 0.0;
+let ls: LSystem = new LSystem("X", controls.iteration, vec3.fromValues(r / 255, g / 255, b / 255), leafScale);
+
+function reload() {
+  ls = new LSystem("X", controls.iteration, vec3.fromValues(r / 255, g / 255, b / 255), leafScale);
+}
+
+function readOBJ(file: string): string {
+  var text = "";
+  var rf = new XMLHttpRequest();
+  rf.open("GET", file, false);
+  rf.onreadystatechange = function () {
+      if (rf.readyState === 4) {
+          if (rf.status === 200 || rf.status == 0) {
+              var allText = rf.responseText;
+              text = allText;
+          }
+      }
+  }
+  rf.send(null);
+  return text;
+}
 
 function loadScene() {
-  square = new Square();
-  square.create();
+
+  var objstr1 = readOBJ('https://raw.githubusercontent.com/effieyanfei/hw04-l-systems/master/src/cube.obj');
+  var objstr2 = readOBJ('https://raw.githubusercontent.com/effieyanfei/hw04-l-systems/master/src/sphere.obj');
+  var objstr3 = readOBJ('https://raw.githubusercontent.com/effieyanfei/hw04-l-systems/master/src/bat.obj');
+  var objstr4 = readOBJ('https://raw.githubusercontent.com/effieyanfei/hw04-l-systems/master/src/leaf.obj');
+
+  branch = new Mesh(objstr1, vec3.fromValues(0.0, 0.0, 0.0));
+  branch.create();
+
+  turn = new Mesh(objstr2, vec3.fromValues(0.0, 0.0, 0.0));
+  turn.create();
+
+  leaf = new Mesh(objstr4, vec3.fromValues(0.0, 0.0, 0.0));
+  leaf.create();
+
+  bat = new Mesh(objstr3, vec3.fromValues(0.0, 0.0, 0.0));
+  bat.create();
+
   screenQuad = new ScreenQuad();
   screenQuad.create();
 
@@ -28,6 +82,39 @@ function loadScene() {
   // offsets and gradiated colors for a 100x100 grid
   // of squares, even though the VBO data for just
   // one square is actually passed to the GPU
+  branch.setInstanceVBOs(ls.getTFloat32Array(ls.Btransformations, 1),
+  ls.getTFloat32Array(ls.Btransformations, 2),
+  ls.getTFloat32Array(ls.Btransformations, 3),
+  ls.getTFloat32Array(ls.Btransformations, 4),
+  ls.getCFloat32Array(ls.Bcolors));
+  branch.setNumInstances(ls.Btransformations.length); // grid of "particles"
+
+  turn.setInstanceVBOs(ls.getTFloat32Array(ls.Ttransformations, 1),
+  ls.getTFloat32Array(ls.Ttransformations, 2),
+  ls.getTFloat32Array(ls.Ttransformations, 3),
+  ls.getTFloat32Array(ls.Ttransformations, 4),
+  ls.getCFloat32Array(ls.Tcolors));
+  turn.setNumInstances(ls.Ttransformations.length);
+
+  leaf.setInstanceVBOs(ls.getTFloat32Array(ls.Ltransformations, 1),
+  ls.getTFloat32Array(ls.Ltransformations, 2),
+  ls.getTFloat32Array(ls.Ltransformations, 3),
+  ls.getTFloat32Array(ls.Ltransformations, 4),
+  ls.getCFloat32Array(ls.Lcolors));
+  leaf.setNumInstances(ls.Ltransformations.length);
+
+  bat.setInstanceVBOs(ls.getTFloat32Array(ls.Htransformations, 1),
+  ls.getTFloat32Array(ls.Htransformations, 2),
+  ls.getTFloat32Array(ls.Htransformations, 3),
+  ls.getTFloat32Array(ls.Htransformations, 4),
+  ls.getCFloat32Array(ls.Hcolors));
+  bat.setNumInstances(ls.Htransformations.length);
+
+}
+
+function loadSquare() {
+  square = new Square();
+  square.create();
   let offsetsArray = [];
   let colorsArray = [];
   let n: number = 100.0;
@@ -49,6 +136,8 @@ function loadScene() {
   square.setNumInstances(n * n); // grid of "particles"
 }
 
+
+
 function main() {
   // Initial display for framerate
   const stats = Stats();
@@ -60,6 +149,9 @@ function main() {
 
   // Add controls to the gui
   const gui = new DAT.GUI();
+  gui.add(controls, 'iteration', 8, 12).step(1);
+  gui.add(controls, 'leafScale', 0.1, 1.0).step(0.1);
+  var colorController = gui.addColor(palette, 'leaf');
 
   // get canvas and webgl context
   const canvas = <HTMLCanvasElement> document.getElementById('canvas');
@@ -73,13 +165,14 @@ function main() {
 
   // Initial call to load scene
   loadScene();
+  loadSquare();
 
   const camera = new Camera(vec3.fromValues(50, 50, 10), vec3.fromValues(50, 50, 0));
 
   const renderer = new OpenGLRenderer(canvas);
   renderer.setClearColor(0.2, 0.2, 0.2, 1);
-  gl.enable(gl.BLEND);
-  gl.blendFunc(gl.ONE, gl.ONE); // Additive blending
+ // gl.enable(gl.BLEND);
+ //  gl.blendFunc(gl.ONE, gl.ONE); // Additive blending
 
   const instancedShader = new ShaderProgram([
     new Shader(gl.VERTEX_SHADER, require('./shaders/instanced-vert.glsl')),
@@ -93,6 +186,29 @@ function main() {
 
   // This function will be called every frame
   function tick() {
+    var newColor = colorController.getValue();
+    if(newColor[0] != r || newColor[1] != g || newColor[2] != b) {
+      r = newColor[0];
+      g = newColor[1];
+      b = newColor[2];
+      ls = new LSystem("X", prevIteratoin, vec3.fromValues(r / 255, g / 255, b / 255), leafScale);
+      loadScene();
+    }
+
+    if(controls.iteration != prevIteratoin)
+    {
+      prevIteratoin = controls.iteration;
+      ls = new LSystem("X", prevIteratoin, vec3.fromValues(r / 255, g / 255, b / 255), leafScale);
+      loadScene();
+    }
+
+    if(controls.leafScale != leafScale)
+    {
+      leafScale = controls.leafScale;
+      ls = new LSystem("X", prevIteratoin, vec3.fromValues(r / 255, g / 255, b / 255), leafScale);
+      loadScene();
+    }
+    
     camera.update();
     stats.begin();
     instancedShader.setTime(time);
@@ -102,6 +218,10 @@ function main() {
     renderer.render(camera, flat, [screenQuad]);
     renderer.render(camera, instancedShader, [
       square,
+      branch,
+      turn,
+      leaf,
+      bat,
     ]);
     stats.end();
 
@@ -125,4 +245,4 @@ function main() {
   tick();
 }
 
-main();
+main();
\ No newline at end of file
diff --git a/src/rendering/gl/Drawable.ts b/src/rendering/gl/Drawable.ts
index d5420f6..a79f6ce 100644
--- a/src/rendering/gl/Drawable.ts
+++ b/src/rendering/gl/Drawable.ts
@@ -9,6 +9,10 @@ abstract class Drawable {
   bufTranslate: WebGLBuffer;
   bufCol: WebGLBuffer;
   bufUV: WebGLBuffer;
+  bufT1: WebGLBuffer;
+  bufT2: WebGLBuffer;
+  bufT3: WebGLBuffer;
+  bufT4: WebGLBuffer;
 
   idxGenerated: boolean = false;
   posGenerated: boolean = false;
@@ -16,7 +20,10 @@ abstract class Drawable {
   colGenerated: boolean = false;
   translateGenerated: boolean = false;
   uvGenerated: boolean = false;
-
+  T1Generated: boolean = false;
+  T2Generated: boolean = false;
+  T3Generated: boolean = false;
+  T4Generated: boolean = false;
   numInstances: number = 0; // How many instances of this Drawable the shader program should draw
 
   abstract create() : void;
@@ -28,6 +35,10 @@ abstract class Drawable {
     gl.deleteBuffer(this.bufCol);
     gl.deleteBuffer(this.bufTranslate);
     gl.deleteBuffer(this.bufUV);
+    gl.deleteBuffer(this.bufT1);
+    gl.deleteBuffer(this.bufT2);
+    gl.deleteBuffer(this.bufT3);
+    gl.deleteBuffer(this.bufT4);
   }
 
   generateIdx() {
@@ -55,6 +66,26 @@ abstract class Drawable {
     this.bufTranslate = gl.createBuffer();
   }
 
+  generateT1() {
+    this.T1Generated = true;
+    this.bufT1 = gl.createBuffer();
+  }
+
+  generateT2() {
+    this.T2Generated = true;
+    this.bufT2 = gl.createBuffer();
+  }
+
+  generateT3() {
+    this.T3Generated = true;
+    this.bufT3 = gl.createBuffer();
+  }
+
+  generateT4() {
+    this.T4Generated = true;
+    this.bufT4 = gl.createBuffer();
+  }
+
   generateUV() {
     this.uvGenerated = true;
     this.bufUV = gl.createBuffer();
@@ -102,6 +133,34 @@ abstract class Drawable {
     return this.uvGenerated;
   }
 
+  bindT1(): boolean{
+    if(this.T1Generated) {
+      gl.bindBuffer(gl.ARRAY_BUFFER, this.bufT1);
+    }
+    return this.T1Generated;
+  }
+
+  bindT2(): boolean{
+    if(this.T2Generated) {
+      gl.bindBuffer(gl.ARRAY_BUFFER, this.bufT2);
+    }
+    return this.T2Generated;
+  }
+
+  bindT3(): boolean{
+    if(this.T3Generated) {
+      gl.bindBuffer(gl.ARRAY_BUFFER, this.bufT3);
+    }
+    return this.T3Generated;
+  }
+
+  bindT4(): boolean{
+    if(this.T4Generated) {
+      gl.bindBuffer(gl.ARRAY_BUFFER, this.bufT4);
+    }
+    return this.T4Generated;
+  }
+
   elemCount(): number {
     return this.count;
   }
diff --git a/src/rendering/gl/ShaderProgram.ts b/src/rendering/gl/ShaderProgram.ts
index fa9f450..80399d3 100644
--- a/src/rendering/gl/ShaderProgram.ts
+++ b/src/rendering/gl/ShaderProgram.ts
@@ -26,6 +26,10 @@ class ShaderProgram {
   attrCol: number; // This time, it's an instanced rendering attribute, so each particle can have a unique color. Not per-vertex, but per-instance.
   attrTranslate: number; // Used in the vertex shader during instanced rendering to offset the vertex positions to the particle's drawn position.
   attrUV: number;
+  attrT1: number;
+  attrT2: number;
+  attrT3: number;
+  attrT4: number;
 
   unifModel: WebGLUniformLocation;
   unifModelInvTr: WebGLUniformLocation;
@@ -50,6 +54,11 @@ class ShaderProgram {
 
     this.attrPos = gl.getAttribLocation(this.prog, "vs_Pos");
     this.attrCol = gl.getAttribLocation(this.prog, "vs_Col");
+    this.attrNor = gl.getAttribLocation(this.prog, "vs_Nor");
+    this.attrT1 = gl.getAttribLocation(this.prog, "vs_T1");
+    this.attrT2 = gl.getAttribLocation(this.prog, "vs_T2");
+    this.attrT3 = gl.getAttribLocation(this.prog, "vs_T3");
+    this.attrT4 = gl.getAttribLocation(this.prog, "vs_T4");
     this.attrTranslate = gl.getAttribLocation(this.prog, "vs_Translate");
     this.attrUV = gl.getAttribLocation(this.prog, "vs_UV");
     this.unifModel      = gl.getUniformLocation(this.prog, "u_Model");
@@ -151,6 +160,30 @@ class ShaderProgram {
       gl.vertexAttribDivisor(this.attrTranslate, 1); // Advance 1 index in translate VBO for each drawn instance
     }
 
+    if (this.attrT1 != -1 && d.bindT1()) {
+      gl.enableVertexAttribArray(this.attrT1);
+      gl.vertexAttribPointer(this.attrT1, 4, gl.FLOAT, false, 0, 0);
+      gl.vertexAttribDivisor(this.attrT1, 1); // Advance 1 index in nor VBO for each vertex
+    }
+
+    if (this.attrT2 != -1 && d.bindT2()) {
+      gl.enableVertexAttribArray(this.attrT2);
+      gl.vertexAttribPointer(this.attrT2, 4, gl.FLOAT, false, 0, 0);
+      gl.vertexAttribDivisor(this.attrT2, 1); // Advance 1 index in nor VBO for each vertex
+    }
+
+    if (this.attrT3 != -1 && d.bindT3()) {
+      gl.enableVertexAttribArray(this.attrT3);
+      gl.vertexAttribPointer(this.attrT3, 4, gl.FLOAT, false, 0, 0);
+      gl.vertexAttribDivisor(this.attrT3, 1); // Advance 1 index in nor VBO for each vertex
+    }
+
+    if (this.attrT4 != -1 && d.bindT4()) {
+      gl.enableVertexAttribArray(this.attrT4);
+      gl.vertexAttribPointer(this.attrT4, 4, gl.FLOAT, false, 0, 0);
+      gl.vertexAttribDivisor(this.attrT4, 1); // Advance 1 index in nor VBO for each vertex
+    }
+
     if (this.attrUV != -1 && d.bindUV()) {
       gl.enableVertexAttribArray(this.attrUV);
       gl.vertexAttribPointer(this.attrUV, 2, gl.FLOAT, false, 0, 0);
@@ -178,6 +211,10 @@ class ShaderProgram {
     if (this.attrCol != -1) gl.disableVertexAttribArray(this.attrCol);
     if (this.attrTranslate != -1) gl.disableVertexAttribArray(this.attrTranslate);
     if (this.attrUV != -1) gl.disableVertexAttribArray(this.attrUV);
+    if (this.attrT1 != -1) gl.disableVertexAttribArray(this.attrT1);
+    if (this.attrT2 != -1) gl.disableVertexAttribArray(this.attrT2);
+    if (this.attrT3 != -1) gl.disableVertexAttribArray(this.attrT3);
+    if (this.attrT4 != -1) gl.disableVertexAttribArray(this.attrT4);
   }
 };
 
diff --git a/src/shaders/flat-frag.glsl b/src/shaders/flat-frag.glsl
index 99362d2..0e8bb25 100644
--- a/src/shaders/flat-frag.glsl
+++ b/src/shaders/flat-frag.glsl
@@ -8,6 +8,65 @@ uniform float u_Time;
 in vec2 fs_Pos;
 out vec4 out_Col;
 
+float rand3D(vec3 p) {
+    return fract(sin(dot(p, vec3(dot(p,vec3(127.1, 311.7, 456.9)),
+                          dot(p,vec3(269.5, 183.3, 236.6)),
+                          dot(p, vec3(420.6, 631.2, 235.1))
+                    ))) * 438648.5453);
+}
+
+float interpNoise3D(float x, float y, float z) {
+    int intX = int(floor(x));
+    float fractX = fract(x);
+    int intY = int(floor(y));
+    float fractY = fract(y);
+    int intZ = int(floor(z));
+    float fractZ = fract(z);
+
+    float v1 = rand3D(vec3(intX, intY, intZ));
+    float v2 = rand3D(vec3(intX + 1, intY, intZ));
+    float v3 = rand3D(vec3(intX, intY + 1, intZ));
+    float v4 = rand3D(vec3(intX + 1, intY + 1, intZ));
+
+    float v5 = rand3D(vec3(intX, intY, intZ + 1));
+    float v6 = rand3D(vec3(intX + 1, intY, intZ + 1));
+    float v7 = rand3D(vec3(intX, intY + 1, intZ + 1));
+    float v8 = rand3D(vec3(intX + 1, intY + 1, intZ + 1));
+
+    float i1 = mix(v1, v2, fractX);
+    float i2 = mix(v3, v4, fractX);
+
+    float i3 = mix(v5, v6, fractX);
+    float i4 = mix(v7, v8, fractX);
+
+    float i5 = mix(i1, i2, fractY);
+    float i6 = mix(i3, i4, fractY);
+
+    float i7 = mix(i5, i6, fractZ);
+
+    return i7;
+}
+
+float fbm(float x, float y, float z) {
+    float total = 0.0;
+    float persistence = 0.5;
+    int octaves = 8;
+
+    for(int i = 1; i <= octaves; i++) {
+        float freq = pow(2.0, float(i));
+        float amp = pow(persistence, float(i));
+
+        total += interpNoise3D(x * freq,
+                               y * freq,
+                               z * freq) * amp;
+    }
+    return total;
+}
+
+
 void main() {
-  out_Col = vec4(0.5 * (fs_Pos + vec2(1.0)), 0.0, 1.0);
+  float n = 1.0 - fbm(fs_Pos.x + 0.1 * sin(0.005 * float(u_Time)), fs_Pos.y + 0.1 * sin(0.005 * float(u_Time)), sin(0.005 * float(u_Time)) * fs_Pos.x);
+  //n = fbm(n,n,n);
+  //out_Col = vec4(0.5 * (fs_Pos + vec2(1.0)), 0.0, 1.0);
+  out_Col = vec4(n, n, n, 1.0);
 }
diff --git a/src/shaders/flat-vert.glsl b/src/shaders/flat-vert.glsl
index 7d913da..38371d4 100644
--- a/src/shaders/flat-vert.glsl
+++ b/src/shaders/flat-vert.glsl
@@ -2,7 +2,6 @@
 precision highp float;
 
 // The vertex shader used to render the background of the scene
-
 in vec4 vs_Pos;
 out vec2 fs_Pos;
 
diff --git a/src/shaders/instanced-frag.glsl b/src/shaders/instanced-frag.glsl
index 72e7460..39620fc 100644
--- a/src/shaders/instanced-frag.glsl
+++ b/src/shaders/instanced-frag.glsl
@@ -9,5 +9,5 @@ out vec4 out_Col;
 void main()
 {
     float dist = 1.0 - (length(fs_Pos.xyz) * 2.0);
-    out_Col = vec4(dist) * fs_Col;
+    out_Col = fs_Col;
 }
diff --git a/src/shaders/instanced-vert.glsl b/src/shaders/instanced-vert.glsl
index d8b8996..c0f4557 100644
--- a/src/shaders/instanced-vert.glsl
+++ b/src/shaders/instanced-vert.glsl
@@ -11,6 +11,10 @@ in vec4 vs_Nor; // Non-instanced, and presently unused
 in vec4 vs_Col; // An instanced rendering attribute; each particle instance has a different color
 in vec3 vs_Translate; // Another instance rendering attribute used to position each quad instance in the scene
 in vec2 vs_UV; // Non-instanced, and presently unused in main(). Feel free to use it for your meshes.
+in vec4 vs_T1;
+in vec4 vs_T2;
+in vec4 vs_T3;
+in vec4 vs_T4;
 
 out vec4 fs_Col;
 out vec4 fs_Pos;
@@ -20,10 +24,12 @@ void main()
     fs_Col = vs_Col;
     fs_Pos = vs_Pos;
 
-    vec3 offset = vs_Translate;
-    offset.z = (sin((u_Time + offset.x) * 3.14159 * 0.1) + cos((u_Time + offset.y) * 3.14159 * 0.1)) * 1.5;
+    //vec3 offset = vs_Translate;
+    mat4 t = mat4(vs_T1, vs_T2, vs_T3, vs_T4);
+    //t = transpose(t);
 
-    vec3 billboardPos = offset + vs_Pos.x * u_CameraAxes[0] + vs_Pos.y * u_CameraAxes[1];
+    vec4 newPos = t * vs_Pos;
+    //offset.z = (sin((u_Time + offset.x) * 3.14159 * 0.1) + cos((u_Time + offset.y) * 3.14159 * 0.1)) * 1.5;
 
-    gl_Position = u_ViewProj * vec4(billboardPos, 1.0);
+    gl_Position = u_ViewProj * newPos;
 }
diff --git a/src/sphere.obj b/src/sphere.obj
new file mode 100644
index 0000000..e298afc
--- /dev/null
+++ b/src/sphere.obj
@@ -0,0 +1,1610 @@
+# This file uses centimeters as units for non-parametric coordinates.
+
+mtllib sphere.mtl
+g default
+v 0.103867 -0.689541 -0.033749
+v 0.088355 -0.689541 -0.064194
+v 0.064194 -0.689541 -0.088355
+v 0.033749 -0.689541 -0.103867
+v 0.000000 -0.689541 -0.109213
+v -0.033749 -0.689541 -0.103867
+v -0.064194 -0.689541 -0.088355
+v -0.088355 -0.689541 -0.064194
+v -0.103867 -0.689541 -0.033749
+v -0.109213 -0.689541 0.000000
+v -0.103867 -0.689541 0.033749
+v -0.088355 -0.689541 0.064194
+v -0.064194 -0.689541 0.088355
+v -0.033749 -0.689541 0.103867
+v -0.000000 -0.689541 0.109213
+v 0.033749 -0.689541 0.103867
+v 0.064194 -0.689541 0.088355
+v 0.088355 -0.689541 0.064194
+v 0.103867 -0.689541 0.033749
+v 0.109213 -0.689541 0.000000
+v 0.205177 -0.663967 -0.066666
+v 0.174534 -0.663967 -0.126806
+v 0.126806 -0.663967 -0.174534
+v 0.066666 -0.663967 -0.205177
+v 0.000000 -0.663967 -0.215736
+v -0.066666 -0.663967 -0.205177
+v -0.126806 -0.663967 -0.174534
+v -0.174534 -0.663967 -0.126806
+v -0.205177 -0.663967 -0.066666
+v -0.215736 -0.663967 0.000000
+v -0.205177 -0.663967 0.066666
+v -0.174534 -0.663967 0.126806
+v -0.126806 -0.663967 0.174534
+v -0.066666 -0.663967 0.205177
+v -0.000000 -0.663967 0.215736
+v 0.066666 -0.663967 0.205177
+v 0.126806 -0.663967 0.174534
+v 0.174534 -0.663967 0.126806
+v 0.205177 -0.663967 0.066666
+v 0.215736 -0.663967 0.000000
+v 0.301435 -0.622044 -0.097942
+v 0.256416 -0.622044 -0.186297
+v 0.186297 -0.622044 -0.256416
+v 0.097942 -0.622044 -0.301435
+v 0.000000 -0.622044 -0.316947
+v -0.097942 -0.622044 -0.301435
+v -0.186297 -0.622044 -0.256416
+v -0.256416 -0.622044 -0.186297
+v -0.301435 -0.622044 -0.097942
+v -0.316947 -0.622044 0.000000
+v -0.301435 -0.622044 0.097942
+v -0.256416 -0.622044 0.186297
+v -0.186297 -0.622044 0.256416
+v -0.097942 -0.622044 0.301435
+v -0.000000 -0.622044 0.316947
+v 0.097942 -0.622044 0.301435
+v 0.186297 -0.622044 0.256416
+v 0.256416 -0.622044 0.186297
+v 0.301435 -0.622044 0.097942
+v 0.316947 -0.622044 0.000000
+v 0.390270 -0.564804 -0.126806
+v 0.331984 -0.564804 -0.241200
+v 0.241200 -0.564804 -0.331984
+v 0.126806 -0.564804 -0.390270
+v 0.000000 -0.564804 -0.410354
+v -0.126806 -0.564804 -0.390270
+v -0.241200 -0.564804 -0.331984
+v -0.331984 -0.564804 -0.241200
+v -0.390270 -0.564804 -0.126806
+v -0.410354 -0.564804 0.000000
+v -0.390270 -0.564804 0.126806
+v -0.331984 -0.564804 0.241200
+v -0.241200 -0.564804 0.331984
+v -0.126806 -0.564804 0.390270
+v -0.000000 -0.564804 0.410354
+v 0.126806 -0.564804 0.390270
+v 0.241200 -0.564804 0.331984
+v 0.331984 -0.564804 0.241200
+v 0.390270 -0.564804 0.126806
+v 0.410354 -0.564804 0.000000
+v 0.469496 -0.493657 -0.152548
+v 0.399377 -0.493657 -0.290164
+v 0.290164 -0.493657 -0.399377
+v 0.152548 -0.493657 -0.469496
+v 0.000000 -0.493657 -0.493657
+v -0.152548 -0.493657 -0.469496
+v -0.290164 -0.493657 -0.399377
+v -0.399377 -0.493657 -0.290164
+v -0.469496 -0.493657 -0.152548
+v -0.493657 -0.493657 0.000000
+v -0.469496 -0.493657 0.152548
+v -0.399377 -0.493657 0.290164
+v -0.290164 -0.493657 0.399377
+v -0.152548 -0.493657 0.469496
+v -0.000000 -0.493657 0.493657
+v 0.152548 -0.493657 0.469496
+v 0.290164 -0.493657 0.399377
+v 0.399377 -0.493657 0.290164
+v 0.469496 -0.493657 0.152548
+v 0.493657 -0.493657 0.000000
+v 0.537161 -0.410354 -0.174534
+v 0.456936 -0.410354 -0.331984
+v 0.331984 -0.410354 -0.456936
+v 0.174534 -0.410354 -0.537161
+v 0.000000 -0.410354 -0.564804
+v -0.174534 -0.410354 -0.537161
+v -0.331984 -0.410354 -0.456936
+v -0.456936 -0.410354 -0.331984
+v -0.537161 -0.410354 -0.174534
+v -0.564804 -0.410354 0.000000
+v -0.537161 -0.410354 0.174534
+v -0.456936 -0.410354 0.331984
+v -0.331984 -0.410354 0.456936
+v -0.174534 -0.410354 0.537161
+v -0.000000 -0.410354 0.564804
+v 0.174534 -0.410354 0.537161
+v 0.331984 -0.410354 0.456936
+v 0.456936 -0.410354 0.331984
+v 0.537161 -0.410354 0.174534
+v 0.564804 -0.410354 0.000000
+v 0.591599 -0.316947 -0.192222
+v 0.503244 -0.316947 -0.365628
+v 0.365628 -0.316947 -0.503244
+v 0.192222 -0.316947 -0.591599
+v 0.000000 -0.316947 -0.622044
+v -0.192222 -0.316947 -0.591599
+v -0.365628 -0.316947 -0.503244
+v -0.503244 -0.316947 -0.365628
+v -0.591599 -0.316947 -0.192222
+v -0.622044 -0.316947 0.000000
+v -0.591599 -0.316947 0.192222
+v -0.503244 -0.316947 0.365628
+v -0.365628 -0.316947 0.503244
+v -0.192222 -0.316947 0.591599
+v -0.000000 -0.316947 0.622044
+v 0.192222 -0.316947 0.591599
+v 0.365628 -0.316947 0.503244
+v 0.503244 -0.316947 0.365628
+v 0.591599 -0.316947 0.192222
+v 0.622044 -0.316947 0.000000
+v 0.631471 -0.215736 -0.205177
+v 0.537161 -0.215736 -0.390270
+v 0.390270 -0.215736 -0.537161
+v 0.205177 -0.215736 -0.631471
+v 0.000000 -0.215736 -0.663967
+v -0.205177 -0.215736 -0.631470
+v -0.390270 -0.215736 -0.537161
+v -0.537161 -0.215736 -0.390270
+v -0.631470 -0.215736 -0.205177
+v -0.663967 -0.215736 0.000000
+v -0.631470 -0.215736 0.205177
+v -0.537161 -0.215736 0.390270
+v -0.390270 -0.215736 0.537161
+v -0.205177 -0.215736 0.631470
+v -0.000000 -0.215736 0.663967
+v 0.205177 -0.215736 0.631470
+v 0.390270 -0.215736 0.537161
+v 0.537161 -0.215736 0.390270
+v 0.631470 -0.215736 0.205177
+v 0.663967 -0.215736 0.000000
+v 0.655793 -0.109213 -0.213080
+v 0.557851 -0.109213 -0.405302
+v 0.405302 -0.109213 -0.557851
+v 0.213080 -0.109213 -0.655793
+v 0.000000 -0.109213 -0.689541
+v -0.213080 -0.109213 -0.655793
+v -0.405302 -0.109213 -0.557851
+v -0.557851 -0.109213 -0.405302
+v -0.655793 -0.109213 -0.213080
+v -0.689541 -0.109213 0.000000
+v -0.655793 -0.109213 0.213080
+v -0.557851 -0.109213 0.405302
+v -0.405302 -0.109213 0.557850
+v -0.213080 -0.109213 0.655793
+v -0.000000 -0.109213 0.689541
+v 0.213080 -0.109213 0.655793
+v 0.405302 -0.109213 0.557850
+v 0.557850 -0.109213 0.405302
+v 0.655793 -0.109213 0.213080
+v 0.689541 -0.109213 0.000000
+v 0.663967 0.000000 -0.215736
+v 0.564804 0.000000 -0.410354
+v 0.410354 0.000000 -0.564804
+v 0.215736 0.000000 -0.663967
+v 0.000000 0.000000 -0.698137
+v -0.215736 0.000000 -0.663967
+v -0.410354 0.000000 -0.564804
+v -0.564804 0.000000 -0.410354
+v -0.663967 0.000000 -0.215736
+v -0.698136 0.000000 0.000000
+v -0.663967 0.000000 0.215736
+v -0.564804 0.000000 0.410354
+v -0.410354 0.000000 0.564804
+v -0.215736 0.000000 0.663967
+v -0.000000 0.000000 0.698136
+v 0.215736 0.000000 0.663967
+v 0.410354 0.000000 0.564804
+v 0.564804 0.000000 0.410354
+v 0.663967 0.000000 0.215736
+v 0.698136 0.000000 0.000000
+v 0.655793 0.109213 -0.213080
+v 0.557851 0.109213 -0.405302
+v 0.405302 0.109213 -0.557851
+v 0.213080 0.109213 -0.655793
+v 0.000000 0.109213 -0.689541
+v -0.213080 0.109213 -0.655793
+v -0.405302 0.109213 -0.557851
+v -0.557851 0.109213 -0.405302
+v -0.655793 0.109213 -0.213080
+v -0.689541 0.109213 0.000000
+v -0.655793 0.109213 0.213080
+v -0.557851 0.109213 0.405302
+v -0.405302 0.109213 0.557850
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