save project

snake.py

@@ -59,8 +59,8 @@ while True:
     if x==apple_x and y==apple_y:
         apple_x=random.randint(0,660)
         apple_y=random.randint(0,480)
-
     screen.blit(background, (0, 0))
+    position.pop(0)
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
@@ -73,4 +73,4 @@ while True:
     screen.blit(food, (apple_x, apple_y))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(5)
\ No newline at end of file