#include <wiringPi.h>
#include <softPwm.h>

int main()
{
    int LedPin[3] = {20,21,22};
    
    int i=0;
    // Check how to Setup - http://wiringpi.com/reference/setup/
    wiringPiSetupGpio();


    for(i=0;i<3;i++) // Setup three PINS for Soft PWM
    {
        //int softPwmCreate (int pin, int initialValue, int pwmRange) ;
        softPwmCreate(LedPin[i],0,100);
    }
    while(1)
    {
        for(i=0;i<100;i++)
        {
            // void softPwmWrite (int pin, int value) ;
            softPwmWrite(LedPin[0],i);
            softPwmWrite(LedPin[1],i);
            softPwmWrite(LedPin[2],i);
            delay(10);
        }
        for(i=100;i>0;i--)
        {
            softPwmWrite(LedPin[0],i);
            softPwmWrite(LedPin[1],i);
            softPwmWrite(LedPin[2],i);
            delay(10);
        }
    }
    return 0;
}