int ledm = 8;
int ledk = 9;
int ledh = 10;

void setup() {
  Serial.begin(9600);
  pinMode(ledm, OUTPUT);
  pinMode(ledk, OUTPUT);
  pinMode(ledh, OUTPUT);

}

void loop(){
  digitalWrite(ledm, HIGH);
  digitalWrite(ledk, LOW);
  digitalWrite(ledh, LOW);
  Serial.println("Merah Hidup");
  Serial.println("Kuning Mati");
  Serial.println("Hijau Mati");
  delay(3000);
  digitalWrite(ledm, LOW);
  digitalWrite(ledk, HIGH);
  digitalWrite(ledh, LOW);
  Serial.println("Merah Mati");
  Serial.println("Kuning Hidup");
  Serial.println("Hijau Mati");
  delay(1000);
  digitalWrite(ledm, LOW);
  digitalWrite(ledk, LOW);
  digitalWrite(ledh, HIGH);
  Serial.println("Merah Mati");
  Serial.println("Kuning Mati");
  Serial.println("Hijau Hidup");
  delay(2000);
}