auto save

snake.py

@@ -53,10 +53,10 @@ while True:
     else:
     else:
         y += 30
         y += 30
     position.append((x, y))
     position.append((x, y))
-    position.pop(0)
     if x==apple_x and y==apple_y:
     if x==apple_x and y==apple_y:
         apple_x=random.randint(1,21)*30
         apple_x=random.randint(1,21)*30
         apple_y=random.randint(1,15)*30
         apple_y=random.randint(1,15)*30
+    else:
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     # 将贪吃蛇的头画上去