#define ENB 3
#define DATA 2 
#define SHIFT 4

bool data[8] = {0,1,0,1,0,1,0,1};

void WriteLines(){
  digitalWrite(ENB, LOW);
  for(int i = 8; i >= 0; i--){
    digitalWrite(DATA, data[i]);

    digitalWrite(SHIFT, HIGH);
    delay(10);
    digitalWrite(SHIFT, LOW);
    delay(10);
  }
  digitalWrite(ENB, HIGH);
}

void setup() {
  pinMode(ENB, OUTPUT);
  pinMode(DATA, OUTPUT);
  pinMode(SHIFT, OUTPUT);
  
}


void loop() {

  for(int i = 0; i < 8; i++){ data[i] = !data[i]; }

  WriteLines();
  delay(1000);
  
  
}