从左到右能连续地并且循环往复地点亮八个指示灯 从左到右能连续间隔地并且循环往复地点亮八个指示灯 开关作为键盘方式或使用继电器控制方式控制上面三种指示灯显示 -From left to right, and the cycle can be continuously lit place eight light from left to right, and the cycle can be a continuous interval in place of the eight