fixed high cpu consumption on mobile devices

js/eyecandy.js

@@ -1,5 +1,11 @@
 (function() {
 
+    if( /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
+      var element = document.getElementById('demo-canvas');
+      element.style.backgroundImage="url('images/gekruessel.png')";
+      element.style.backgroundPosition="center center";
+      element.style.height="300px";
+    } else {
       var width, height, largeHeader, canvas, ctx, points, target, animateHeader = true;
       
       // Main
@@ -181,5 +187,5 @@
       function getDistance(p1, p2) {
           return Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2);
       }
-    
+    }
 })();