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 = 50
y = 50
x_speed = 10
y_speed = 10
# load img
my_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()