在python pygame中使用类更改对象颜色时，如何在列表项之间进行循环？

import pygame

class GameObject:
    def __init__(self, x, y, color):
        self.x = x
        self.y = y
        self.color = color

    def draw(self, screen):
        pygame.draw.rect(screen, self.color, (self.x, self.y, 50, 50))

# 初始化Pygame
pygame.init()

# 设置窗口尺寸
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))

# 创建游戏对象列表
game_objects = [
    GameObject(100, 100, (255, 0, 0)),  # 红色
    GameObject(200, 100, (0, 255, 0)),  # 绿色
    GameObject(300, 100, (0, 0, 255))  # 蓝色
]

# 游戏主循环
running = True
current_index = 0  # 当前对象索引
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 清空屏幕
    screen.fill((0, 0, 0))

    # 绘制游戏对象
    game_objects[current_index].draw(screen)

    # 更新当前对象颜色
    game_objects[current_index].color = (255, 255, 255)  # 修改为白色

    # 切换到下一个对象
    current_index = (current_index + 1) % len(game_objects)

    # 更新屏幕显示
    pygame.display.flip()

# 退出Pygame
pygame.quit()