本程序，实现交通灯功能！随着各种交通工具的发展和交通指挥的需要，第一盏名副其实的三色灯(红、黄、绿三种标志)于1918年诞生。它是三色圆形四面投影器，被安装在纽约市五号街的一座高塔上，由于它的诞生，使城市交通大为改善。中国最早的马路红绿灯，是于1928年出现在上海的英租界。从最早的手牵皮带到20世纪50年代的电气控制，从采用计算机控制到现代化的电子定时监控，交通信号灯在科学化、自动化上不断地更新、发展和完善。

-Along with the development of various traffic tools and traffic control needs, the first one literally trichromatic lamp (red olivine three marks) in 1918 was born it is trichromatic round all projection device, are installed in New York city no.5 street of the towers, because of its birth, urban traffic greatly improve the earliest Chinese road traffic lights, is in 1928 out