diff --git a/src/index.js b/src/index.js
index 2f46b4b..22258f1 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,8 +1,18 @@
 const { StackObj } = require ('./stack-obj');
 
 function baseConverter(decNumber, base) {
-  // your code
-  return ;
+  let stack = new StackObj();
+  const allowBases = [2,8,16,10,36];
+  const range = '0123456789ABCDFGHIJKLMNOPQRSTVWXYZ';
+  
+  if(!allowBases.includes(base)) return null;
+
+  while(decNumber > 0){
+    stack.push(range[decNumber % base]);
+    decNumber = parseInt(decNumber / base)
+  }
+  
+  return stack.toString();
 }
 
 module.exports = { baseConverter };