使用pygame在屏幕上创建雨滴

import pygame
import sys

pygame.init()
screen = pygame.display.set_mode((800, 600))

class Raindrop(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.image = pygame.Surface((2, 10))
        self.image.fill((0, 0, 255))
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y

    def update(self):
        self.rect.y += 5
        if self.rect.y > 600:
            self.rect.y = -10

raindrops = pygame.sprite.Group()

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    screen.fill((255, 255, 255))

    # 创建雨滴对象并添加到精灵组
    raindrop = Raindrop(random.randint(0, 800), -10)
    raindrops.add(raindrop)

    # 更新雨滴位置并绘制到屏幕上
    raindrops.update()
    raindrops.draw(screen)

    pygame.display.flip()