这是个单片机的流水灯实验，编绎如果没有出错的话，会从P1口轮流输出低电平，接上灯后就是流水灯。-This is a single-chip flow lamp experiments, made unravel if there is no error, then I will rotate the output from the P1 low-level, with access to the lamp after the lamp is wasted.