I need an animated gif, 640 x 480, to serve as a background/skin for an audio program I'm designing. Imagine a block that is fades from cobalt blue to dark purple in diagonal lines. Now imagine these diagonal lines moving down the screen. Here's a quick and crappy paintshop of what I'm kinda talking about.
http://www.engin.umd.umich.edu/~ashemon/background.bmp
See how I want it to fade from one color to another? Then have it all just moving down/sideways, I guess it really doesn't matter. The file wouldn't have to be super large, because it would loop after one line met the point where the las line started (in the animation)

If you have questions post them... :) You guys have no idea how much this would help me out. (The colors are not correct in the .bmp, so choosing any colors that would look sweet as an audio program background will work. :))

Edit - here's a small idea of what I was thinking (Different colors... maybe dark blue and black?) and just straight moving, no morphing of the individual lines (to make it a bit easier ;))
http://www.engin.umd.umich.edu/~ashemon/23bg.gif