The Embarrassingly Easy LED Case Mod

[Alan]

"These RGB LEDs don't let you control their colour or cycle rate. They just loop endlessly through their fixed sequence of colours - generally red, green, blue, then combinations of each two, then all three at once, then back to red. You can get fast-change, slow-change and flash-flash-flash versions, but you can't turn one into another. And they don't project their three pools of light on top of each other - you get three separate circles of light."

http://www.dansdata.com/gz065.htm
http://www.makezine.com/blog/archive/2007/01/the_embarrassin.html