四种亮灯方式自由切换的跑马灯程序，若想在最开始就体会到学习verilog的乐趣，那就先学习跑马灯程序吧-Marquee program four free switching of lighting the way, if you want to appreciate at the very beginning of learning verilog fun it would be to learn Marquee program

实现简单自动售货机的基本功能。投币找零功能，并用Led数码管显示，输出结果用Led显示。-Basic functions simple vending machines. Coin change for function and use Led digital tube display, the output display Led.

7段共阳极数码管，译码显示，Verilog HDL程序-Code based on Verilog HDL