按键控制流水灯， 进行左移、右移、中间往两边、两边往中间的功能切换， 可以暂停中切换，以及动态切换（内付keil源程序+Proteus仿真）-Buttons control the water lights, left, right, middle to both sides, both sides of the switch to the middle of the function, you can pause switch, as well as dynamic switching (wi