add remove highlight when stop

sumorobot.js

@@ -9,6 +9,8 @@ var sumostart = false;
 var sumorobot = null;
 /* Blockly workspace */
 var workspace = null;
+/* last hightlighted block */
+var highlighted = "";
 /* disable enable hotkeys */
 var hotkeys = true;
 /* the sumorobot code */
@@ -50,6 +52,7 @@ Sumorobot.prototype.connect = function() {
         /* when scope is received */
         if (evt.data.length == 20) {
             workspace.highlightBlock(evt.data);
+            highlighted = evt.data;
         } else {
             console.log(evt.data);
         }
@@ -388,6 +391,9 @@ window.onload = function() {
     $(".btn-stop").click(function() {
         sumostart = false;
         sumorobot.send("stop");
+        setTimeout(function() {
+            workspace.highlightBlock(highlighted, false);
+        }, 500);
     });
 
     /* remote control checkbox listener */