I know that it's entirely possible, but does one exist already? I'm thinking something like the rainbowlight application, where color and intensity would change depending on where the screen is touched. It would also be awesome to be able to change the speed of the flashing. Of course, I know it's pointless, but so are the various snowglobe applications out there. But it would certainly be fun to waste time with, plus, the screen is nice and bright and all.