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


void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(ledm,OUTPUT);
pinMode(ledk,OUTPUT);
pinMode(ledh,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(ledm,HIGH);
digitalWrite(ledk,LOW);
digitalWrite(ledh,LOW);
Serial.println("merah menyala");
Serial.println("kuning mati");
Serial.println("hijau mati");
delay(3000);
Serial.println("");
digitalWrite(ledm,LOW);
digitalWrite(ledk,HIGH);
digitalWrite(ledh,LOW);
Serial.println("kuning menyala");
Serial.println("merah mati");
Serial.println("hijau mati");
delay(1000);
Serial.println("");
digitalWrite(ledm,LOW);
digitalWrite(ledk,LOW);
digitalWrite(ledh,HIGH);
Serial.println("hijau menyala");
Serial.println("merah mati");
Serial.println("kuning mati");
delay(2000);
Serial.println("");
}