篮球自动弹跳

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()