import time
import random
import numpy as np

x = int(input("Size:"))

state = []
new = []
for i in range(x):
	state.append(0)
	new.append(0)

state[int(x/2)] = 1

step = 0
while True:
	r = random.randint(0,5)
	if (r == -1):
		state[int(x/2)] = 1

	for i in range(len(state)):
		if (state[i] == 1):
			print("\033[1;42m"+" ",end="")
		else:
			print("\033[1;40m"+" ",end="")

	print()
	time.sleep(0.05)

	for i in range(1,x-1):
		if (state[i-1] == 1 and state[i] == 0 and state[i+1] == 0): new[i] = 1
		if (state[i-1] == 0 and state[i] == 1 and state[i+1] == 0): new[i] = 1
		if (state[i-1] == 0 and state[i] == 0 and state[i+1] == 1): new[i] = 1
		if (state[i-1] == 0 and state[i] == 1 and state[i+1] == 0): new[i] = 1

	for i in range(1,x-1):
		state[i] = new[i]
		new[i] = 0
	
	step += 1