Darren New wrote:
> I wonder if you could create a fractal CA?
> 
> Imagine a CA, where each cell is actually 9 subcells. You apply the 
> rules to the subcells to make them live and dead. Then after each 
> subcell generation, you interpret those 9 cells to decide whether the 
> supercell is alive or dead (like, 5+ subcells alive means the supercell 
> is alive or some such), and it turns out the supercells are following 
> the same rules as the subcells.

Something very much like this has been done in the game of like 
automata.  It's called the "unit cell":

http://www.radicaleye.com/lifepage/patterns/unitcell/ucdesc.html

There's also a variant called the "deep cell" which allows you to 
simultaneously simulate two independent versions of the game of life on 
the same meta-grid.  This lets you create a hierarchy of unit cells 
while also being to simulate other patterns at each of the levels at the 
same time.

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