#include "SoftwarePWM.h"

int dir;
int dutyCycle;
unsigned long timer;

uint8_t pins [10] = { 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
SoftwarePWM swPWM(pins, 10);

void setup(){
  for (int i = 0; i < 10; ++i) {
    swPWM.setFrequency(i, 500);
  }
}

void loop() 
{
  unsigned long now = millis();
  if (now - timer > 10)
  {
    for (int i = 0; i < 10; ++i)
    {
      if (dir == 1)
      {
        if (dutyCycle < 255)
        {
          dutyCycle++;
        }
        else
        {
          dir = 0;
        }
      }
      else
      {
        if (dutyCycle > 0)
        {
          dutyCycle--;
        }
        else
        {
          dir = 1;
        }
      }
      swPWM.setDutyCycle(i, dutyCycle);
    }
    timer = now;
  }
  swPWM.refresh();
}