save project

snake.py

@@ -8,6 +8,7 @@ pygame.init()
 screen = pygame.display.set_mode((660, 480))
 
 # 背景
+FPSCLOCK=pygame.time.Clock()
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
@@ -31,4 +32,5 @@ while True:
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面
-    pygame.display.update()
\ No newline at end of file
+    pygame.display.update()
+    FPSCLOCK.tick(3)
\ No newline at end of file