在pygame中连续生成钢琴瓷砖中的瓷砖

import pygame
import random

pygame.init()

window_width = 800
window_height = 600
window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption("钢琴瓷砖生成")

class Tile(pygame.sprite.Sprite):
    def __init__(self, color, width, height):
        super().__init__()
        self.image = pygame.Surface([width, height])
        self.image.fill(color)
        self.rect = self.image.get_rect()

def generate_tile():
    tile_width = 100
    tile_height = 20
    tile_color = (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
    tile = Tile(tile_color, tile_width, tile_height)
    tile.rect.x = random.randint(0, window_width - tile_width)
    tile.rect.y = -tile_height
    return tile

tiles = pygame.sprite.Group()
clock = pygame.time.Clock()

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 生成瓷砖
    if random.random() < 0.1:
        tile = generate_tile()
        tiles.add(tile)

    # 更新瓷砖位置
    for tile in tiles:
        tile.rect.y += 5

    # 绘制瓷砖和背景
    window.fill((255, 255, 255))
    tiles.draw(window)

    pygame.display.flip()
    clock.tick(60)

pygame.quit()