我在‘`pygame`’中的圆圈超出了边界，然后又回来了(通过边界剪裁)

import pygame
import sys

pygame.init()

# 设置窗口大小和标题
width, height = 800, 600
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Circle Boundary Clipping")

# 圆圈初始位置和速度
circle_radius = 50
circle_x, circle_y = width // 2, height // 2
speed_x, speed_y = 5, 5

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

    # 更新圆圈位置
    circle_x += speed_x
    circle_y += speed_y

    # 边界剪裁
    if circle_x < circle_radius:
        circle_x = circle_radius
        speed_x *= -1
    elif circle_x > width - circle_radius:
        circle_x = width - circle_radius
        speed_x *= -1

    if circle_y < circle_radius:
        circle_y = circle_radius
        speed_y *= -1
    elif circle_y > height - circle_radius:
        circle_y = height - circle_radius
        speed_y *= -1

    # 绘制圆圈
    screen.fill((255, 255, 255))
    pygame.draw.circle(screen, (255, 0, 0), (circle_x, circle_y), circle_radius)
    pygame.display.flip()