save project

snake.py

@@ -60,7 +60,8 @@ while True:
         num2 = random.randint(1,16)
         apple_x = num1 = 30 - 30
         apple_y = num2 = 30 - 30
-    position.pop(0)
+    else:
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -69,8 +70,9 @@ while True:
     for i in range(len(position)-1):
         screen.blit(body, position[i])
 
+
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (apple_x, apple_y))
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
\ No newline at end of file