import pygame
import sys

pygame.init()
size = width,height = 600,400
speed = [-2,1]
bg =(255,255,255)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("初次见面，请大家多多关照！")
turtle=pygame.image.load("turtle.jpeg")
position = turtle.get_rect()

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

	if position.left<0 or position.right >width:
		turtle = pygame.transform.flip(turtle,True,False)
		speed[0]=-speed[0]
	if position.top<0 or position.bottom >height:
		speed[1] = -speed[1]

	screen.fill(bg)
	screen.blit(turtle,position)
	pygame.display.flip()
	pygame.time.delay(10)