>>> gen = [ch == '#' for ch in '_###_##_#_#_#_#__#__']
>>> for n in range(10):
	print(''.join('#' if cell else '_' for cell in gen))
	gen = [0] + gen + [0]
	gen = [sum(gen[m:m+3]) == 2 for m in range(len(gen)-2)]

	
_###_##_#_#_#_#__#__
_#_#####_#_#_#______
__##___##_#_#_______
__##___###_#________
__##___#_##_________
__##____###_________
__##____#_#_________
__##_____#__________
__##________________
__##________________
>>>