int D4 = 4;
int D5 = 5;
int D2 = 2;


void setup() {
  pinMode(D2, OUTPUT);
  pinMode(D4, OUTPUT);
  pinMode(D5, OUTPUT);
}

void loop() {
  digitalWrite(D4, HIGH);
  delay(15000);
  digitalWrite(D4, LOW);
  digitalWrite(D5, HIGH);
  delay(15000);
  digitalWrite(D5, LOW);
  digitalWrite(D2, HIGH);
  delay(5000);
  digitalWrite(D2, LOW);
  digitalWrite(D4, HIGH);
  delay(15000);
}