如何在此代码中添加重新启动按钮？ 蛇游戏

Question

def game_over():
    canvas.delete(ALL)
    canvas.create_text(canvas.winfo_width()/2, canvas.winfo_height()/2,
    font=('consolas',70), text="GAME OVER", fill="red", tag="gameover")

我需要一个重启按钮。