int count = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(1, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(8, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (count == 0) {
    digitalWrite(1, LOW);
    digitalWrite(2, LOW);
    digitalWrite(4, LOW);
    digitalWrite(8, LOW);
  } else if (count == 1) {
    digitalWrite(1, HIGH);
    digitalWrite(2, LOW);
    digitalWrite(4, LOW);
    digitalWrite(8, LOW);
  } else if (count == 2) {
    digitalWrite(1, LOW);
    digitalWrite(2, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(8, LOW);
  } else if (count == 3) {
    digitalWrite(1, HIGH);
    digitalWrite(2, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(8, LOW);
  } else if (count == 4) {
    digitalWrite(1, LOW);
    digitalWrite(2, LOW);
    digitalWrite(4, HIGH);
    digitalWrite(8, LOW);
  } else if (count == 5) {
    digitalWrite(1, HIGH);
    digitalWrite(2, LOW);
    digitalWrite(4, HIGH);
    digitalWrite(8, LOW);
  }
  //ETC


  count = count + 1;
  delay(1000);


}