The first one is nice, though it's just a fractal.
btw, 1024x767 isn't a resolution, it's 1024x768.
If you want to see something like this that's done well, check this topic out: http://forums.gfxvoid.com/t-11134.htm&hl=
That's the way to do something like that, examine his techniques and maybe try that first one again.