EDA交通灯，有两个输入：CLK,CLR，六个输出:左红黄绿，LR LY LG,右红黄绿RR RY RG,用状态机表示-EDA traffic lights, has two input: CLK, CLR, 6 output: Left red yellow and green, LR LY LG, the right of red yellow and green RR RY RG, with a state machine that