save project

my_Tetris.py

@@ -22,7 +22,7 @@ while True:
             exit()
 
     # 将背景图画上去
-    pygame.Surface.blit(background,(0,0))
+    screen.blit(background,(0,0))
     # 得分
     score_show=font.render(str(score),True,(0,0,0))
     pygame.Surface.blit(score_show,(350,70))