---

void setup() {
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);

  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
}

void loop() {
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);

  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);

  delay(4000);

  for (int i = 0; i < 3; i++) {
    digitalWrite(3, LOW);
    delay(500);
    digitalWrite(3, HIGH);
    delay(500);
  }

  digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
  delay(1500);

  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);

  delay(500);

  digitalWrite(8, LOW);
  digitalWrite(6, HIGH);

  delay(4000);

  for (int i = 0; i < 3; i++) {
    digitalWrite(6, LOW);
    delay(500);
    digitalWrite(6, HIGH);
    delay(500);
  }

  digitalWrite(6, LOW);
  digitalWrite(7, HIGH);

  delay(1500);

  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);

  delay(500);
}