diff --git a/practice/2021/hayk_ohanyan/AbstractFactory/Bmw/Factory.class.js b/practice/2021/hayk_ohanyan/AbstractFactory/Bmw/Factory.class.js
new file mode 100644
index 0000000..de531db
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/AbstractFactory/Bmw/Factory.class.js
@@ -0,0 +1,18 @@
+const X = require('./Models/X.class');
+
+class BmwFactory {
+  static models = {
+    x5: new X('x5', 300, '$108,000', 2020),
+    x6: new X('x6', 320, '$111,000', 2020)
+  }
+
+  create(model) {
+    if (!BmwFactory.models[model]) {
+      throw new Error(`Bmw model ${model} not found :(`);
+    }
+
+    return BmwFactory.models[model];
+  }
+}
+
+module.exports = BmwFactory;
diff --git a/practice/2021/hayk_ohanyan/AbstractFactory/Bmw/Models/X.class.js b/practice/2021/hayk_ohanyan/AbstractFactory/Bmw/Models/X.class.js
new file mode 100644
index 0000000..10c8550
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/AbstractFactory/Bmw/Models/X.class.js
@@ -0,0 +1,18 @@
+class X {
+  constructor(model, maxSpeed, price, year) {
+    this.model = model;
+    this.year = year;
+    this.price = price;
+    this.maxSpeed = maxSpeed;
+  }
+
+  info() {
+    console.log('=== Bmw X ===');
+    console.log(`Model: ${this.model}`);
+    console.log(`Year: ${this.year}`);
+    console.log(`Max speed: ${this.maxSpeed}`);
+    console.log(`Price: ${this.price}`, '\n');
+  }
+}
+
+module.exports = X;
diff --git a/practice/2021/hayk_ohanyan/AbstractFactory/CarFactory.class.js b/practice/2021/hayk_ohanyan/AbstractFactory/CarFactory.class.js
new file mode 100644
index 0000000..9b2c60b
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/AbstractFactory/CarFactory.class.js
@@ -0,0 +1,19 @@
+const MercedesFactory = require('./Mercedes/Factory.class');
+const BmwFactory = require('./Bmw/Factory.class');
+
+class CarFactory {
+  static cars = {
+    mercedes: MercedesFactory,
+    bmw: BmwFactory
+  }
+
+  create(type, model) {
+    if (!CarFactory.cars[type]) {
+      throw new Error(`${type.toUpperCase()} car not found :(`);
+    }
+
+    return CarFactory.cars[type].models[model];
+  }
+}
+
+module.exports = CarFactory;
diff --git a/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Factory.class.js b/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Factory.class.js
new file mode 100644
index 0000000..d5b11f5
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Factory.class.js
@@ -0,0 +1,21 @@
+const C = require('./Models/C.class');
+const E = require('./Models/E.class');
+
+class MercedesFactory {
+  static models = {
+    c300: new C('c300', 250, '$41,600', 2021),
+    c200: new C('c200', 234, '$37,500', 2021),
+    c180: new C('c300', 223, '$25,000', 2019),
+    e320: new E('e320', 245, '$55,300', 2020)
+  }
+
+  create(model) {
+    if (!MercedesFactory.models[model]) {
+      throw new Error(`Mercedes model ${model} not found :(`);
+    }
+
+    return MercedesFactory.models[model];
+  }
+}
+
+module.exports = MercedesFactory;
diff --git a/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Models/C.class.js b/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Models/C.class.js
new file mode 100644
index 0000000..8afcc58
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Models/C.class.js
@@ -0,0 +1,18 @@
+class C {
+  constructor(model, maxSpeed, price, year) {
+    this.model = model;
+    this.year = year;
+    this.price = price;
+    this.maxSpeed = maxSpeed;
+  }
+
+  info() {
+    console.log('=== Mercedes C class ===');
+    console.log(`Model: ${this.model}`);
+    console.log(`Year: ${this.year}`);
+    console.log(`Max speed: ${this.maxSpeed}`);
+    console.log(`Price: ${this.price}`, '\n');
+  }
+}
+
+module.exports = C;
diff --git a/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Models/E.class.js b/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Models/E.class.js
new file mode 100644
index 0000000..92d0a23
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/AbstractFactory/Mercedes/Models/E.class.js
@@ -0,0 +1,18 @@
+class E {
+  constructor(model, maxSpeed, price, year) {
+    this.model = model;
+    this.year = year;
+    this.price = price;
+    this.maxSpeed = maxSpeed;
+  }
+
+  info() {
+    console.log('=== Mercedes E class ===');
+    console.log(`Model: ${this.model}`);
+    console.log(`Year: ${this.year}`);
+    console.log(`Max speed: ${this.maxSpeed}`);
+    console.log(`Price: ${this.price}`, '\n');
+  }
+}
+
+module.exports = E;
diff --git a/practice/2021/hayk_ohanyan/AbstractFactory/index.js b/practice/2021/hayk_ohanyan/AbstractFactory/index.js
new file mode 100644
index 0000000..b1e2f5a
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/AbstractFactory/index.js
@@ -0,0 +1,18 @@
+const CarFactory = require('./CarFactory.class');
+
+const factory = new CarFactory();
+
+try {
+  const cars = [
+    factory.create('bmw', 'x5'),
+    factory.create('mercedes', 'c300'),
+    factory.create('mercedes', 'e320'),
+    factory.create('mercedes', 'c200'),
+    factory.create('bmw', 'x6'),
+    factory.create('mercedes', 'c180')
+  ];
+
+  cars.forEach(car => car.info());
+} catch (e) {
+  console.log(e);
+}
diff --git a/practice/2021/hayk_ohanyan/FactoryMethod/MercedesCars/Factory.class.js b/practice/2021/hayk_ohanyan/FactoryMethod/MercedesCars/Factory.class.js
new file mode 100644
index 0000000..1b86080
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/FactoryMethod/MercedesCars/Factory.class.js
@@ -0,0 +1,19 @@
+const C = require('./Models/C.class');
+
+class MercedesFactory {
+  static models = {
+    c300: new C('c300', 250, '$41,600', 2021),
+    c200: new C('c200', 234, '$37,500', 2021),
+    c180: new C('c300', 223, '$25,000', 2019)
+  }
+
+  create(model) {
+    if (!MercedesFactory.models[model]) {
+      throw new Error(`Model ${model} not found :(`);
+    }
+
+    return MercedesFactory.models[model];
+  }
+}
+
+module.exports = MercedesFactory;
diff --git a/practice/2021/hayk_ohanyan/FactoryMethod/MercedesCars/Models/C.class.js b/practice/2021/hayk_ohanyan/FactoryMethod/MercedesCars/Models/C.class.js
new file mode 100644
index 0000000..8f6765d
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/FactoryMethod/MercedesCars/Models/C.class.js
@@ -0,0 +1,17 @@
+class C {
+  constructor(model, maxSpeed, price, year) {
+    this.model = model;
+    this.year = year;
+    this.price = price;
+    this.maxSpeed = maxSpeed;
+  }
+
+  info() {
+    console.log(`Model: ${this.model}`);
+    console.log(`Year: ${this.year}`);
+    console.log(`Max speed: ${this.maxSpeed}`);
+    console.log(`Price: ${this.price}`, '\n');
+  }
+}
+
+module.exports = C;
diff --git a/practice/2021/hayk_ohanyan/FactoryMethod/index.js b/practice/2021/hayk_ohanyan/FactoryMethod/index.js
new file mode 100644
index 0000000..2a9681c
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/FactoryMethod/index.js
@@ -0,0 +1,15 @@
+const MercedesFactory = require('./MercedesCars/Factory.class');
+
+const factory = new MercedesFactory();
+
+try {
+  const cars = [
+    factory.create('c300'),
+    factory.create('c180'),
+    factory.create('c200'),
+  ];
+  
+  cars.forEach(car => car.info());
+} catch (e) {
+  console.log(e);
+} 
diff --git a/practice/2021/hayk_ohanyan/PatternFactory/Factory.class.js b/practice/2021/hayk_ohanyan/PatternFactory/Factory.class.js
new file mode 100644
index 0000000..87261eb
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/PatternFactory/Factory.class.js
@@ -0,0 +1,19 @@
+const Laptop = require('./Gadget/Laptop.class');
+const Tablet = require('./Gadget/Tablet.class');
+const SmartPhone = require('./Gadget/SmartPhone.class');
+
+class GadgetFactory {
+  static gadgets = {
+    Laptop,
+    Tablet,
+    SmartPhone
+  }
+
+  create(type, options) {
+    const Gadget = GadgetFactory.gadgets[type];
+
+    return new Gadget(options);
+  }
+}
+
+module.exports = GadgetFactory;
diff --git a/practice/2021/hayk_ohanyan/PatternFactory/Gadget/Laptop.class.js b/practice/2021/hayk_ohanyan/PatternFactory/Gadget/Laptop.class.js
new file mode 100644
index 0000000..e0bba76
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/PatternFactory/Gadget/Laptop.class.js
@@ -0,0 +1,9 @@
+class Laptop {
+  constructor(options) {
+    this.name = options?.name || '';
+    this.hdd = options?.hdd || 0;
+    this.ram = options?.ram || 0;
+  }
+}
+
+module.exports = Laptop;
diff --git a/practice/2021/hayk_ohanyan/PatternFactory/Gadget/SmartPhone.class.js b/practice/2021/hayk_ohanyan/PatternFactory/Gadget/SmartPhone.class.js
new file mode 100644
index 0000000..89ce96e
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/PatternFactory/Gadget/SmartPhone.class.js
@@ -0,0 +1,11 @@
+class SmartPhone {
+  constructor(options) {
+    this.name = options?.name || '';
+    this.hdd = options?.hdd || 0;
+    this.ram = options?.ram || 0;
+    this.network = options?.network || '4g';
+    this.color = options?.color || 'black';
+  }
+}
+
+module.exports = SmartPhone;
diff --git a/practice/2021/hayk_ohanyan/PatternFactory/Gadget/Tablet.class.js b/practice/2021/hayk_ohanyan/PatternFactory/Gadget/Tablet.class.js
new file mode 100644
index 0000000..6b72927
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/PatternFactory/Gadget/Tablet.class.js
@@ -0,0 +1,10 @@
+class Tablet {
+  constructor(options) {
+    this.name = options?.name || '';
+    this.hdd = options?.hdd || 0;
+    this.ram = options?.ram || 0;
+    this.network = options?.network || '5g';
+  }
+}
+
+module.exports = Tablet;
diff --git a/practice/2021/hayk_ohanyan/PatternFactory/index.js b/practice/2021/hayk_ohanyan/PatternFactory/index.js
new file mode 100644
index 0000000..acab3c2
--- /dev/null
+++ b/practice/2021/hayk_ohanyan/PatternFactory/index.js
@@ -0,0 +1,24 @@
+const GadgetFactory = require('./Factory.class')
+
+const factory = new GadgetFactory()
+
+const gadgets = [
+  factory.create('Tablet', {
+    name: 'Ipad 4',
+    ram: 8,
+    hdd: 256,
+    network: '4g'
+  }),
+  factory.create('Laptop', {
+    hdd: 1000,
+    ram: 16,
+    name: 'Asus VivoBook'
+  }),
+  factory.create('SmartPhone', {
+    hdd: 64,
+    ram: 4,
+    name: 'HTC'
+  })
+]
+
+console.log(gadgets);