diff --git a/index.html b/index.html
index 86b9d16..0811a30 100644
--- a/index.html
+++ b/index.html
@@ -30,6 +30,8 @@
             background-color: #f8f8f8;
             border: darkslategrey 3px dashed;
             border-radius: 1cqw;
+            display: flex;
+            align-items: center;
         }
 
         #displayDiv embed {
@@ -37,6 +39,11 @@
             width: 7cqw
         }
 
+        #displayDiv #restart img {
+            height: 3cqmax;
+            width: 3cqmax;
+        }
+
         #connect-circle {
             width: 1cqmax;
             height: 1cqmax;
@@ -62,6 +69,9 @@
 <!--    <div id="connect-circle">-->
 <!--        <div id="connect-tooltip">Connecting...</div>-->
 <!--    </div>-->
+    <button id="restart" title="Restart">
+        <img src="restart-svgrepo-com.svg">
+    </button>
     <embed type="image/svg+xml" id="digit0">
     <embed type="image/svg+xml" id="digit1">
     <embed type="image/svg+xml" id="digit2">
@@ -84,15 +94,15 @@
 
     };
     const workspace = Blockly.inject("blocklyDiv", config);
+    const CHANGE_EVENTS = new Set([Blockly.Events.BLOCK_CHANGE, Blockly.Events.BLOCK_CREATE, Blockly.Events.BLOCK_DELETE, Blockly.Events.BLOCK_MOVE])
     workspace.addChangeListener(function (event) {
-            if (event.type === Blockly.Events.BLOCK_CHANGE) {
+            if (CHANGE_EVENTS.has(event.type)) {
                 segm14StartScript()
             }
         }
     )
     //todo display stuff led
     //todo save/restore
-    //todo rerun
     document.getElementById("digit0").src = led14Svg
     document.getElementById("digit1").src = led14Svg
     document.getElementById("digit2").src = led14Svg
@@ -108,6 +118,9 @@
         MqttClient.save(button.info.file_key, JSON.stringify(state))
     })
     EXAMPLES.init(workspace)
+    document.getElementById("restart").addEventListener("click", function() {
+        segm14StartScript()
+    });
     // MqttClient.start()
 
 </script>
diff --git a/led_control.js b/led_control.js
index 8d9dd10..87d5551 100644
--- a/led_control.js
+++ b/led_control.js
@@ -99,31 +99,31 @@ const font = {
 };
 
 
-var stopMe = false
-var runningTimeout = null
-
-function segm14Stop()
-{
-    stopMe = true
-    clearTimeout(runningTimeout)
-}
 
 function segm14StartScript() {
+    if(this!==window) {
+        segm14StartScript.call(window)
+        return
+    }
+    window.stopMe = true
+    clearTimeout(window.runningTimeout)
     const js = javascript.javascriptGenerator.workspaceToCode(workspace)
-    segm14Stop()
     segm14Text("\s\s\s\s")
-    const f = (async ()=>{}).constructor(js)
+    //Tricky stuff: here we create an async function using browser internal constructor
+    const f = (async () => {
+    }).constructor(js)
     setTimeout(() => {
-        stopMe = false
+        window.stopMe = false
         f()
-    })
+    },100)
 }
+
 // noinspection JSUnusedGlobalSymbols
 function segm14Text(text) {
-    if(stopMe) {
-        return
-    }
     for (let i = 0; i < 4; i++) {
+        if (window.stopMe) {
+            return
+        }
         const shape = font[text.charAt(i)]
         segm14Output(i, shape === undefined ? "" : shape)
     }
@@ -131,9 +131,11 @@ function segm14Text(text) {
 
 // noinspection JSUnusedGlobalSymbols
 function segm14Delay(ms) {
-    if(stopMe) {
+    if (window.stopMe) {
         return null
     }
-    return new Promise(resolve => runningTimeout = setTimeout(resolve, ms * 1000.0));
+    return new Promise(resolve => {
+        if (!window.stopMe) window.runningTimeout = setTimeout(resolve, ms * 1000.0)
+    });
 }
 
diff --git a/restart-svgrepo-com.svg b/restart-svgrepo-com.svg
new file mode 100644
index 0000000..7b874ca
--- /dev/null
+++ b/restart-svgrepo-com.svg
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg fill="#000000" width="800px" height="800px" viewBox="-7.5 0 32 32" version="1.1" xmlns="http://www.w3.org/2000/svg">
+<title>restart</title>
+<path d="M15.88 13.84c-1.68-3.48-5.44-5.24-9.040-4.6l0.96-1.8c0.24-0.4 0.080-0.92-0.32-1.12-0.4-0.24-0.92-0.080-1.12 0.32l-1.96 3.64c0 0-0.44 0.72 0.24 1.040l3.64 1.96c0.12 0.080 0.28 0.12 0.4 0.12 0.28 0 0.6-0.16 0.72-0.44 0.24-0.4 0.080-0.92-0.32-1.12l-1.88-1.040c2.84-0.48 5.8 0.96 7.12 3.68 1.6 3.32 0.2 7.32-3.12 8.88-1.6 0.76-3.4 0.88-5.080 0.28s-3.040-1.8-3.8-3.4c-0.76-1.6-0.88-3.4-0.28-5.080 0.16-0.44-0.080-0.92-0.52-1.080-0.4-0.080-0.88 0.16-1.040 0.6-0.72 2.12-0.6 4.36 0.36 6.36s2.64 3.52 4.76 4.28c0.92 0.32 1.84 0.48 2.76 0.48 1.24 0 2.48-0.28 3.6-0.84 4.16-2 5.92-7 3.92-11.12z"></path>
+</svg>
\ No newline at end of file