Cellular Automaton

gistfile1.sc

(
Task({
var array,rules;
	array = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxa";
	rules = [[//rule "Chell"
	"a>a>a" -> "x",
	"a>a>x" -> "a",
	"a>x>a" -> "x",
	"a>x>x" -> "a",
	"x>a>a" -> "a",
	"x>a>x" -> "a",
	"x>x>a" -> "a",
	"x>x>x" -> "x",	
	],[//rule 30
	"a>a>a" -> "x",
	"a>a>x" -> "x",
	"a>x>a" -> "x",
	"a>x>x" -> "a",
	"x>a>a" -> "a",
	"x>a>x" -> "a",
	"x>x>a" -> "a",
	"x>x>x" -> "x",	
	],[//rule 90
	"a>a>a" -> "x",
	"a>a>x" -> "a",
	"a>x>a" -> "x",
	"a>x>x" -> "a",
	"x>a>a" -> "a",
	"x>a>x" -> "x",
	"x>x>a" -> "a",
	"x>x>x" -> "x",	
	]].choose;
	62.do({
	array=array.rewriteString(rules).keep(32).postln ;
	});
}).play
)