diff --git a/application/index/view/index/index.html b/application/index/view/index/index.html
index eeb06fd..fa215e6 100644
--- a/application/index/view/index/index.html
+++ b/application/index/view/index/index.html
@@ -23,20 +23,34 @@
   <script src="//cdn.bootcss.com/messenger/1.5.0/js/messenger.min.js"></script>
   <script src="//cdn.bootcss.com/messenger/1.5.0/js/messenger-theme-future.min.js"></script>
 
-  <link href="//cdn.bootcss.com/codemirror/5.30.0/codemirror.min.css" rel="stylesheet">
-  <script src="//cdn.bootcss.com/codemirror/5.30.0/codemirror.min.js"></script>
+  <link href="//cdn.bootcss.com/codemirror/5.30.0/codemirror.css" rel="stylesheet">
+  <script src="//cdn.bootcss.com/codemirror/5.30.0/codemirror.js"></script>
 
-  <script src="//cdn.bootcss.com/codemirror/5.30.0/mode/javascript/javascript.min.js"></script>
-  <script src="//cdn.bootcss.com/codemirror/5.30.0/addon/lint/javascript-lint.min.js"></script>
-  <script src="//cdn.bootcss.com/codemirror/5.30.0/addon/hint/javascript-hint.min.js"></script>
+  <script src="//cdn.bootcss.com/codemirror/5.30.0/mode/javascript/javascript.js"></script>
+  <script src="//cdn.bootcss.com/codemirror/5.30.0/addon/lint/javascript-lint.js"></script>
+  <script src="//cdn.bootcss.com/codemirror/5.30.0/addon/hint/javascript-hint.js"></script>
 
-  <script src="//cdn.bootcss.com/codemirror/5.30.0/addon/lint/yaml-lint.min.js"></script>
+  <link href="//cdn.bootcss.com/codemirror/5.30.0/addon/fold/foldgutter.css" rel="stylesheet">
+  <script src="//cdn.bootcss.com/codemirror/5.30.0/addon/fold/foldgutter.js"></script>
+
+  <script src="//cdn.bootcss.com/codemirror/5.30.0/addon/lint/yaml-lint.js"></script>
 </head>
 <script>
-  code = document.getElementById("code");
-  var editor = CodeMirror.fromTextArea(code, {
-    mode: "javascript"
-  });
+  window.onload = function () {
+    code = document.getElementById("code");
+    window.editor = CodeMirror.fromTextArea(code, {
+      mode: "javascript",
+      lineNumbers: true,
+      lineWrapping: true,
+      extraKeys: {
+        "Ctrl-Q": function (cm) {
+          cm.foldCode(cm.getCursor());
+        }
+      },
+      foldGutter: true,
+      gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"]
+    });
+  }
 </script>
 
 <body>
