save project

snake.py

@@ -61,6 +61,8 @@ while True:
         num2 = random.randint(1,16)
         apple_x = 30*num1-30
         apple_y = 30*num2-30
+else:
+    position.pop(0)
 
     position.pop(0)
     # 将背景图画上去