python实现小球弹跳效果

import pygame, sys pygame.init() screenGameCaption = pygame.display.set_caption("Ball game")screen = pygame.display.set_mode([680, 480]) screen.fill([255, 255, 255])x = 50y = 50x_speed = 10y_speed = 10# load imgmy_ball = pygame.image.load('ball.png') running = True while running:  for event in pygame.event.get():    if event.type == pygame.QUIT:      running = False  pygame.time.delay(100)  pygame.draw.rect(screen, [255, 255, 255], [x, y, 190, 190], 0)  x = x + x_speed  y = y + y_speed   if x > screen.get_width() - 190 or x < 0:    x_speed = - x_speed  if y > screen.get_height() - 190 or y < 0:    y_speed = - y_speed  screen.blit(my_ball, [x, y])  pygame.display.flip()pygame.quit()