在例程中，我们要做的是流水灯实验，顾名思义就是要LED象流水一样的点亮，这样说吧，就是先单独点亮第一个，然后点亮第二个-In the routine, we have to do is water lamp experiments, as the name suggests is to water, like the LED is lit, so to speak, a first single lighting is the first, second and lighting