Enable syntax highlight on JS snippet code.

README.md

@@ -18,21 +18,22 @@ sketch.js lets you get straight to the fun parts of creative coding, without eve
 It gives you a graphics context, an animation loop, normalised input events and a host of useful callbacks to hook into.
 
 Here's an example:
-
-    Sketch.create({
-        setup: function() {
-            this.r = this.g = this.b = random( 100, 200 );
-        },
-        mousemove: function() {
-            this.r = 255 * ( this.mouse.x / this.width );
-            this.g = 255 * ( this.mouse.y / this.height );
-            this.b = 255 * abs( cos( PI * this.mouse.y / this.width ) );
-        },
-        draw: function() {
-            this.fillStyle = 'rgb(' + ~~this.r + ',' + ~~this.g + ',' + ~~this.b + ')';
-            this.fillRect( 0, 0, this.width, this.height );
-        }
-    });
+````javascript
+Sketch.create({
+    setup: function() {
+        this.r = this.g = this.b = random( 100, 200 );
+    },
+    mousemove: function() {
+        this.r = 255 * ( this.mouse.x / this.width );
+        this.g = 255 * ( this.mouse.y / this.height );
+        this.b = 255 * abs( cos( PI * this.mouse.y / this.width ) );
+    },
+    draw: function() {
+        this.fillStyle = 'rgb(' + ~~this.r + ',' + ~~this.g + ',' + ~~this.b + ')';
+        this.fillRect( 0, 0, this.width, this.height );
+    }
+});
+````
 
 [See it in action](http://jsfiddle.net/soulwire/7wtbm/)