add gif demo

docs/index.html

@@ -42,6 +42,9 @@
                 <div class="console"></div>
             </div>
         </section>
+        <div class="popups">
+            <div class="popinner"></div>
+        </div>
         <script src="./assets/js/codemirror.js"></script>
         <script src="./assets/js/javascript.js"></script>
         <script src="./assets/js/consola.js"></script>