save project

snake.py

@@ -18,4 +18,10 @@ while True:
             exit()
 
     # 将背景图画上去
-    pygame.surface.blit
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+    screen.blit(background , (0, 0))
+    # 将贪吃蛇的头画上去
+    screen.blit(right , (290, 120))
+    # 将果实图画上去
+    screen.blit(food , (360, 300))
+    # 刷新窗口
+    pygame.display.update()
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