如何将绘制的圆圈与pygame混合

pip install pygame

import pygame

pygame.init()

screen_width, screen_height = 800, 600
screen = pygame.display.set_mode((screen_width, screen_height))

pygame.display.set_caption("Pygame Circle")

clock = pygame.time.Clock()

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

    # 绘制圆圈
    circle_center = (screen_width // 2, screen_height // 2)
    circle_radius = 50
    circle_color = (255, 0, 0)
    pygame.draw.circle(screen, circle_color, circle_center, circle_radius)

    # 更新屏幕
    pygame.display.flip()

    # 控制屏幕刷新速率
    clock.tick(60)

pygame.quit()