show/hide back button for hex animation

content/hypno/hex/hex.css

@@ -30,6 +30,13 @@
 
 #controls {
     display: none;
+    background-color: rgba(0, 0, 0, 0.7);
+    padding: 5px;
+    border-radius: 10px;
+}
+
+#reload {
+    display: none;
 }
 
 @keyframes death {

content/hypno/hex/hex.js

@@ -206,3 +206,10 @@ for (var i = 0; i < width; ++i) {
 }
 
 setInterval(prestonStep, 1000);
+
+var showControls = false;
+
+window.onclick = function () {
+    document.getElementById("controls").style.display = showControls ? "none" : "block";
+    showControls = !showControls;
+}