diff --git a/roman_numerals.js b/roman_numerals.js
index 8019de3..28383d4 100644
--- a/roman_numerals.js
+++ b/roman_numerals.js
@@ -1,5 +1,29 @@
 function to_roman (num) {
   // your implementation code here
+  let output = ''
+  let roman = {
+  	M: 1000, 
+  	CM: 900, 
+  	D: 500, 
+  	CD: 400,
+  	C: 100,
+  	XC: 90,
+  	L: 50,
+  	XL: 40,
+  	X: 10,
+  	IX: 9,
+  	V: 5,
+  	IV: 4,
+  	I: 1
+  }
+
+  for (let key in roman) {
+  	while (num >= roman[key]) {
+  	  output += key
+  	  num -= roman[key]
+  	}
+  }
+  return output
 }
 
 // Drive code