用C语言程序，结合PWM波占空比实现流水灯的流水效果，还有渐亮渐暗过程-C language program, combined with the PWM wave duty cycle for light water flowing water effects, as well as getting light fades process

PWM控制LED灯渐亮渐灭实验、LED灯、PWM脉冲控制-PWM control of LED lights getting brighter gradually eliminate experiment, LED lights, the PWM pulse control