ATM机安全警示系统:实现如下功能，0：欢迎你前来办理业务 1：欢迎您下次再来 2：请退出一米线外 3：谢谢合作 4：请注意，旁边有人靠近-ATM machine safety warning system: achieving the following functions, 0: you are welcome to come for business 1: Welcome to the next time you come back 2: Quit outside a no