Add output block to "Iterate with JavaScript For Loops" challange

seed/challenges/basic-javascript.json

@@ -824,8 +824,15 @@
         "  ourArray.push(i);",
         "}",
         "var myArray = [];",
-        "//Push the numbers zero through four to myArray using a \"for loop\" like above.",
         "",
+        "// Only change code below this line.",
+        "",
+        "// Push the numbers zero through four to myArray using a \"for loop\" like above.",
+        "",
+        "// Only change code above this line.",
+        "// We use this function to show you the value of your variable in your output box.",
+        "// You'll learn about functions soon.",
+        "if(typeof(myArray) !== \"undefined\"){(function(){return myArray;})();}",
         ""
       ],
       "type": "waypoint",