void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  if(!Serial) Serial.println("SERIAL IS NOT OK");
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(3, HIGH);
  Serial.println("Lampu Hijau Hidup");
  delay(10000);
  digitalWrite(3, LOW);
  Serial.println("Lampu Hijau Mati");

  digitalWrite(4, HIGH);
  Serial.println("Lampu Kuning Hidup");
  delay(5000);
  digitalWrite(4, LOW);
  Serial.println("Lampu Kuning Mati");

  digitalWrite(5, HIGH);
  Serial.println("Lampu Merah Hidup");
  delay(15000);

  digitalWrite(4, HIGH);
  Serial.println("Lampu Kuning Hidup");
  delay(5000);

  digitalWrite(5, LOW);
  Serial.println("Lampu Merah Mati");

  digitalWrite(4, LOW);
  Serial.println("Lampu Kuning Mati");

}