auto save

snake.py

@@ -52,7 +52,11 @@ while True:
     else:
         y += 30
     position.append((x, y))
+    if x == apple_x andY == apple_y:
+        apple_x = random.randint(0,660)
+        apple_y = random.randint(0,480)
     position.pop(0)
+
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去