Arduino driving RGB LED in ping-pong ball

The Arduino Duemilanove connected up to an RGB LED (red-green-blue light-emitting diode) inside a ping-pong ball. There's a 5mm hole in the ping-pong ball, and the LED illuminates it from the inside. The ball is just translucent enough to make a soft glow. The sketch running on the Arduino is a version of this code.

Done