pygame绘制背景

 import pygame
 pygame.init()
 screen = pygame.display.set_mode((640,480))
 # ------- background ---------
 background = pygame.Surface(screen.get_size())
 background.fill((255, 155, 155))     #fill the background white (red,green,blue)
 screen.blit(background, (0,0))     #draw background on screen (overwriting all)
 # --------- flip screen ------------------
 pygame.display.flip()