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A sort of basic self-contained economy. Just to try out an idea. Not very well developed and doesn't do anything aesthetically interesting but does kinda work as a self contained system, until resources deplete anyway.
Each square harvests red, green or blue. They can either sell these primary colours in return for secondary colours (cyan, magenta and yellow) or buy another primary colour and make their own secondary colours. Prices are based on a simple supply/demand thing.
I want to do something a bit (well, far) more dynamic with this sort of idea. I like the idea of small starting discrepancies impacting to almost wholly define the shape of the system as it continues. I also like that it's evident just from looking at it that there are comprehensible rules behind what's happening - you can make guesses as to who sold what to whom, and whether they got a good price and all that shizit. I think I need to carry that through to the aesthetics, they're pretty meaningless here. Ah well, s'a start.