Creates maps using cellular automata rather than the more popular perlin noise method.

2-5 generations or cellular automata and a land percentage between 40-60% tend to create the best looking maps.

Note: there is not a singular cellular automata algorithm, the one used in this code turns a cell into land(#) if 5-7 of its neighbours are land. the function "cellular_automata" is where you can change the rules.

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