Conway's Game of Life

import os, time, copy

def printBoard():
    time.sleep(1)
    os.system('cls')
    for i in xrange(n):
        for j in xrange(n):
            if board[i][j] == 0:
                print " ",
            else:
                print "X",
        print

def countLiveNeighbours(x, y):
    s = 0
    if board[x % n][(y + 1) % n] == 1:
        s = s + 1
    if board[x % n][(y - 1) % n] == 1:
        s = s + 1
    if board[(x - 1) % n][(y + 1) % n] == 1:
        s = s + 1
    if board[(x - 1) % n][y % n] == 1:
        s = s + 1
    if board[(x - 1) % n][(y - 1) % n] == 1:
        s = s + 1
    if board[(x + 1) % n][(y + 1) % n] == 1:
        s = s + 1
    if board[(x + 1) % n][y % n] == 1:
        s = s + 1
    if board[(x + 1) % n][(y - 1) % n] == 1:
        s = s + 1

    return s


n = int(raw_input(" Unesite dimenzije table: "))

board = [[0 for x in xrange(n)] for x in xrange(n)]
copyBoard = copy.deepcopy(board)

while True:
    i = int(raw_input(" x: "))
    if i == -1:
        break
    j = int(raw_input(" y: "))
    board[i][j] = 1
    copyBoard[i][j] = 1

printBoard()

while True:
    for i in xrange(n):
        for j in xrange(n):
            # print countLiveNeighbours(i, j)
            if countLiveNeighbours(i, j) < 2:
                copyBoard[i][j] = 0
            elif countLiveNeighbours(i, j) > 3:
                copyBoard[i][j] = 0
            elif (countLiveNeighbours(i, j) == 3 and board[i][j] == 0):
                copyBoard[i][j] = 1

    board = copy.deepcopy(copyBoard)

    printBoard()
    #break

input()