pygame2，图标移动

#coding:utf-8
import pygame
import sys
from pygame.locals import *
 
#初始化Pygame
pygame.init()
 
size = width,hight = 600,400
speed = [-2,1]
bg = (255,200,255) #RGB颜色
 
#clock = pygame.time.Clock()
#创建指定大写的窗口
screen = pygame.display.set_mode(size)
#设置窗口标题
pygame.display.set_caption('fuck world')
 
#加载图片
turtle = pygame.image.load('a.bmp')
#获得图像的位置矩形
position = turtle.get_rect()
l_head = turtle
r_head = pygame.transform.flip(turtle,True,False)
 
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
 
        if event.type == KEYDOWN:
            if event.key == K_LEFT:
                turtle = l_head
                speed = [-1,0]
            if event.key == K_RIGHT:
                turtle = r_head
                speed = [1,0]
            if event.key == K_UP:
                speed = [0,-1]
            if event.key == K_DOWN:
                speed = [0,1]
    #移动图像
    position = position.move(speed)
 
    if position.left < 0 or position.right > width:
         
        #翻转图像
        turtle = pygame.transform.flip(turtle,True,False)
        #反向移动
        speed[0] = -speed[0]
 
    if position.top < 0 or position.bottom > hight:
        speed[1] = -speed[1]
 
    #填充背景
    screen.fill(bg)
    #双缓冲
    #更新图像
    screen.blit(turtle,position)#bilt方法将一个图像覆盖到另一个图象上
    #更新界面
    pygame.display.flip()
    #延迟10毫秒
    pygame.time.delay(10)
 
    #clock.tick(200)