Arduino ShiftPWM (Fade in, fade out LEDs one by one)

/************************************************************************************************************************************
Fade in LED's one by one using ShiftPWM with one shift register
 ************************************************************************************************************************************/

// You can choose the latch pin yourself.
const int ShiftPWM_latchPin=8;

#define SHIFTPWM_NOSPI
const int ShiftPWM_dataPin = 11;
const int ShiftPWM_clockPin = 12;


// If your LED's turn on if the pin is low, set this to true, otherwise set it to false.
const bool ShiftPWM_invertOutputs = false;

// You can enable the option below to shift the PWM phase of each shift register by 8 compared to the previous.
// This will slightly increase the interrupt load, but will prevent all PWM signals from becoming high at the same time.
// This will be a bit easier on your power supply, because the current peaks are distributed.
const bool ShiftPWM_balanceLoad = false;

#include <ShiftPWM.h>   // include ShiftPWM.h after setting the pins!

// Here you set the number of brightness levels, the update frequency and the number of shift registers.
// These values affect the load of ShiftPWM.
// Choose them wisely and use the PrintInterruptLoad() function to verify your load.
// There is a calculator on my website to estimate the load.

unsigned char maxBrightness = 255;
unsigned char pwmFrequency = 75;
int numRegisters = 1;
int numRGBleds = numRegisters*8/3;

void setup(){

  // Sets the number of 8-bit registers that are used.
  ShiftPWM.SetAmountOfRegisters(numRegisters);

  // SetPinGrouping allows flexibility in LED setup.
  // If your LED's are connected like this: RRRRGGGGBBBBRRRRGGGGBBBB, use SetPinGrouping(4).
  //ShiftPWM.SetPinGrouping(3); //This is the default, but I added here to demonstrate how to use the funtion

  ShiftPWM.Start(pwmFrequency,maxBrightness);
}


void loop()
{
  // Turn all LED's off.
  ShiftPWM.SetAll(0);

  //ShiftPWM.SetOne(0, 255);

  // For every led
  for(int pin = 0; pin < 8; pin++){

    // Fade in
    for(unsigned char brightness = 0; brightness < 255; brightness++){
      ShiftPWM.SetOne(pin, brightness);
      delayMicroseconds(2000);
    }

    // Fade out
    for(unsigned char brightness = 255; brightness > 0; brightness--){
      ShiftPWM.SetOne(pin, brightness);
      delayMicroseconds(2000);
    }

  }

}