diff --git a/includes/script.js b/includes/script.js
index 1abd1c3..28dd653 100644
--- a/includes/script.js
+++ b/includes/script.js
@@ -124,17 +124,19 @@ $(document).ready(function() {
 
         var tiles = input.match(/TIL (.*)\n([01]{8}\n){8}/g);
 
-        for (var i = 0; i < tiles.length; i++) {
-            var name = tiles[i].match(/TIL .*/)[0].replace('TIL ', '');
-            
-            tiles[i] = tiles[i].replace(/TIL .*\n/, '');
+        if (tiles.length > 0) {   
+            for (var i = 0; i < tiles.length; i++) {
+                var name = tiles[i].match(/TIL .*/)[0].replace('TIL ', '');
+                
+                tiles[i] = tiles[i].replace(/TIL .*\n/, '');
 
-            var bitmap = tiles[i].match(/[01]/g);
+                var bitmap = tiles[i].match(/[01]/g);
 
-            bitsyData.tiles[name] = {
-                name: name, 
-                bitmap: _.chunk(bitmap, 8)
-            };
+                bitsyData.tiles[name] = {
+                    name: name, 
+                    bitmap: _.chunk(bitmap, 8)
+                };
+            }
         }
 
         // set palette to first imported palette and redraw
@@ -282,6 +284,7 @@ $(document).ready(function() {
                     }
                 });
             });
+            
             document.getElementById('room-output').getContext('2d').putImageData(imageData, 0, 0);
         });
     }, 30);