int latchPin = 8;

int clockPin = 12;

int dataPin = 11;



byte data = 0; 



void setup() {

  pinMode(latchPin, OUTPUT);

}



void loop() {



  blinkAll_2Bytes(1,500); 



  for (int j = 0; j < 8; j++) {

    digitalWrite(latchPin, 0);

    lightShiftPinA(7-j);

   

    digitalWrite(latchPin, 1);

    delay(1000);

  }

  

  for (int j = 0; j < 8; j++) {

    digitalWrite(latchPin, 0);

    lightShiftPinB(j);

    digitalWrite(latchPin, 1);

    delay(1000);

  } 



}



void lightShiftPinA(int p) {

  int pin;

  pin = 1<< p;



  shiftOut(dataPin, clockPin, pin);   



}



void lightShiftPinB(int p) {

  int pin;

  pin = 1;



  for (int x = 0; x < p; x++) {

    pin = pin * 2; 

  }

  shiftOut(dataPin, clockPin, pin);   

}



void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {



  int i=0;

  int pinState;

  pinMode(myClockPin, OUTPUT);

  pinMode(myDataPin, OUTPUT);



  digitalWrite(myDataPin, 0);

  digitalWrite(myClockPin, 0);



  for (i=7; i>=0; i--)  {

    digitalWrite(myClockPin, 0);



    if ( myDataOut & (1<<i) ) {

      pinState= 1;

    }

    else {	

      pinState= 0;

    }



    digitalWrite(myDataPin, pinState); 

    digitalWrite(myClockPin, 1);

    digitalWrite(myDataPin, 0);

  }



  digitalWrite(myClockPin, 0);

}



void blinkAll_2Bytes(int n, int d) {

  digitalWrite(latchPin, 0);

  shiftOut(dataPin, clockPin, 0);

  shiftOut(dataPin, clockPin, 0);

  digitalWrite(latchPin, 1);

  delay(200);

  for (int x = 0; x < n; x++) {

    digitalWrite(latchPin, 0);

    shiftOut(dataPin, clockPin, 255);

    shiftOut(dataPin, clockPin, 255);

    digitalWrite(latchPin, 1);

    delay(d);

    digitalWrite(latchPin, 0);

    shiftOut(dataPin, clockPin, 0);

    shiftOut(dataPin, clockPin, 0);

    digitalWrite(latchPin, 1);

    delay(d);

  }

}