Here's a translation to lua. It runs about the same speed as the perl one. 

stty size | lua -e 'math.randomseed(os.time()); r, p = io.read, io.wri
+te; H = r"*n" or 24; W = r"*n" or 80; w = 20 + W; a = {}; for k = 1, 
+w * (20 + H) do a[k] = math.random() < 1/3; end; p"\27[H\27[J"; for S
+ = 1, 31 do for P = 1, 2 do b = {}; for c = 1, #a do s = 0; for K, h 
+in ipairs{-w-1, -w, -w+1, -1, 1, w-1, w, w+1} do if a[(c + h) % #a] t
+hen s = s + 1; end; end; b[c] = s < 3; end; a = b; end; p"\27[H"; for
+ y = 10, H + 8 do for x = 10, W + 8 do if a[w * y + x] then p"#" else
+ p" " end; end; p"\n"; end; end;'

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In reply to Re: Patchy pattern using a cellular automaton by ambrus
in thread Patchy pattern using a cellular automaton by ambrus

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