我想在pygame中的图像上画一个圆圈

pygame.draw.circle(surface, color, center, radius, width=0)

import pygame

# 初始化pygame
pygame.init()

# 创建窗口和画布
width, height = 800, 600
screen = pygame.display.set_mode((width, height))
canvas = pygame.Surface((width, height))

# 绘制圆圈
center = (width // 2, height // 2)
radius = 100
color = (255, 0, 0)  # 红色
pygame.draw.circle(canvas, color, center, radius)

# 将画布绘制到窗口上
screen.blit(canvas, (0, 0))
pygame.display.flip()

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

# 退出游戏
pygame.quit()