Pygame生命游戏，工作，可以说明是否正确（代码放置问题？）

Question

我又遇到了我不知道问题或仅仅是我的代码的放置是否关闭，但是在我的python参加了Python中的Conways Life游戏（ 摘自JS ）使用PyGame实际显示系统。

我已经完成了，似乎运行了， 但是在我看来，最终结果似乎并不像您在完成的项目中看到的结果，我的看起来更像是QR码或IDK。

如果您可以看一下，那么很感激。

这是源代码：

from itertools import count
from os import stat
import pygame
import random

WIDTH = 500
HEIGHT = 500

pygame.init()
window = pygame.display.set_mode((WIDTH,HEIGHT))

# create 2d array
def create_2d_list(cols, rows):
    arr = []
    for i in range(cols):
        arr.append([0] * rows)

    return arr
        

resolution = 20

cols = WIDTH // resolution
rows = HEIGHT // resolution

def main():



    # pygame.display.flip()

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                return
            
        global grid
        grid = create_2d_list(cols, rows)
        for i in range(cols):
            for j in range(rows):
                grid[i][j] = random.randint(0,1)

        draw()

        next = create_2d_list(cols, rows)

        # compute next based on grid
        
        for i in range(cols):
            for j in range(rows):
                state = grid[i][j]

                # count live neighbors
                sum = 0
                neighbors = countNeighbors(grid, i , j)


                if state == 0 and neighbors == 3:
                    next[i][j] = 1
                elif state == 1 and (neighbors < 2 or neighbors > 3):
                    next[i][j] = 0
                else:
                    next[i][j] = state
        
        grid = next
        pygame.time.delay(50)
        pygame.display.flip()
        

def draw():
    background = window.fill((255,255,255))


    for i in range(cols):
        for j in range(rows):
            x = i * resolution
            y = j * resolution
            if grid[i][j] == 1:
                pygame.draw.rect(window,(0,0,0), pygame.Rect(x , y, resolution, resolution))
            elif grid[i][j] == 0:
                pygame.draw.rect(window,(255,255,255), pygame.Rect(x , y, resolution, resolution))


def countNeighbors(grid, x, y):
    sum = 0
    for i in range(-1,2):
        for j in range(-1,2):
            col = (x + i + cols) % cols
            row = (x + i + rows) % rows          

            sum += grid[col][row]

    sum -= grid[x][y]
    return sum


if __name__ == "__main__":
    main()

我试图调试它，至少在我看来，康威的生活游戏规则适用。但仍处于更大的态度，它只是看着。

我确实认为这与我的代码安排有关，我不确定如何将其放置为正确。