#define latchPin 4//pin 12 595
#define clockPin 3//pin 11 595
#define dataPin  A0  //pin 14 595    // DS - data serial

void updateShiftRegister(unsigned int leds) {
  byte left_out  = lowByte(~leds);      // extacts the lower byte, right most byte, from a 16-bit word or unsigned integer
  byte right_out = highByte(~leds);     // extracts the higher byte, left most byte, from a 16-bit word or unsigned integer

  digitalWrite(latchPin, LOW);

  // LEDs move from left to right
  shiftOut(dataPin, clockPin, MSBFIRST, right_out);
  shiftOut(dataPin, clockPin, MSBFIRST, left_out);

  digitalWrite(latchPin, HIGH);
}
/* ***************************************************
                     Void Setup
 *************************************************** */
void setup() {
  pinMode(latchPin, OUTPUT);
  pinMode(dataPin,  OUTPUT);
  pinMode(clockPin, OUTPUT);
}
/* ***************************************************
                     Void Loop
 *************************************************** */
void loop() {
  int i = 0;
  unsigned int leds = 0B1111111;


  bitSet(leds, 8);

  // for(i=0; i<=8; i++){
  //   bitSet(leds, i);
  //   updateShiftRegister(leds);
  //   delay(1000);
  // }

  // for(i=0; i<=8; i++){
  //   bitClear(leds, i);
  //   updateShiftRegister(leds);
  //   delay(1000);
  // }
}