Inspired by this sketch http://openprocessing.org/sketch/6707
I decided to make a visual with perlin noise myself.
Click to restart with new random colors.
It will auto restart after 10 seconds. It occasionally glitches and won't restart automatically. I don't know why. Just click and it should be fine.
P.S. I have run this in fullscreen and although it runs slower than normal, it doesn't really lag. I recommend that you try it for yourself.
To tweak this sketch, first download it.
Make your updates, then upload your tweak!