This video shows a super alpha version of my pattern maker for the Gameboy Advance written in a hurry for Blipfestival 2007. Since then more features have been added.
It is similar to my gp2x applications - equations that are varied via the d-pad and buttons.
The GBA runs at about 16MHz so my usual tricks of writing pixels to the screen give less than optimum results but you get the idea...

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