void setup(){
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
}

void loop(){
  digitalWrite(2, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  delay(5000);
  digitalWrite(2, LOW);
  digitalWrite(4, HIGH);
  digitalWrite(5, LOW);
  delay(3000);
  digitalWrite(2, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  delay(5000);
}