自动售货机，5角1元输入，三种饮料输出，余额不足或售完会闪烁相关信息。-THis is a simulator of Vending Machine on Basys2 in verilog. 5jiao and 1yuan as input, 3 chioces for drinks. If all are sold out or more money is need, corresponding signals will flash on the LED screen.