const int dataPin=12;
const int latchPin=6;
const int clockPin=2;

int binary_num=B11111100;

void setup() {
  pinMode(dataPin,OUTPUT);
  pinMode(latchPin,OUTPUT);
  pinMode(clockPin,OUTPUT);
}


void loop() {
  //for(int m=0;m<0;m++)
  {
    digitalWrite(latchPin,HIGH);
    shiftOut(dataPin,clockPin,MSBFIRST, binary_num);
    digitalWrite(latchPin,LOW);
    delay(100);
  }
}