在Pygame中计时敌人列表的闪光

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("计时敌人列表的闪光")
clock = pygame.time.Clock()

class Enemy(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.image = pygame.Surface((50, 50))
        self.image.fill((255, 0, 0))
        self.rect = self.image.get_rect()
        self.rect.center = (x, y)

class Timer:
    def __init__(self, duration):
        self.duration = duration
        self.start_time = pygame.time.get_ticks()

    def is_finished(self):
        return pygame.time.get_ticks() - self.start_time >= self.duration

enemy_list = pygame.sprite.Group()
timer = Timer(3000)  # 设置计时器持续时间为3秒

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

    # 更新敌人列表
    if timer.is_finished():
        x = random.randint(0, window_width)
        y = random.randint(0, window_height)
        enemy = Enemy(x, y)
        enemy_list.add(enemy)
        timer = Timer(3000)  # 重新设置计时器

    # 绘制游戏界面
    window.fill((0, 0, 0))
    enemy_list.draw(window)
    pygame.display.flip()

    clock.tick(60)  # 控制帧率为60