Made output box bigger, fixed another missing var issue

src/blocks/output.js

@@ -10,10 +10,10 @@ module.exports =  {
   },
   output: false,
   execute: function({input}, block){
-    $(block.elem).find("span.output").html(input);
+    $(block.elem).find("textarea.output").html(input);
   },
   pageBlock: {
-    html: "<span class='output'></span>",
+    html: "<textarea class='output' style='width: 190px; height: 135px;'></textarea>",
     js: function(){}
   }
 }

src/blocks/util/coPrime.js

@@ -1,5 +1,5 @@
 function getFactors(num){
-  factors = [];
+  var factors = [];
   for(var i = 2; i <= num; i++){
     if(num%i == 0){
       factors.push(i);
@@ -11,7 +11,7 @@ function getFactors(num){
 function coPrime(a, b){
   aFactors = getFactors(a);
   bFactors = getFactors(b);
-  common = aFactors.filter((factor)=>(bFactors.indexOf(factor) > -1));
+  var common = aFactors.filter((factor)=>(bFactors.indexOf(factor) > -1));
 
   return (common.length == 0);
 }