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(" ");
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("Merah Mati");
Serial.println("kuning Menyala");
Serial.println("Hijau Mati");
delay(1000);
Serial.println(" ");
Serial.println("Merah Mati");
Serial.println("Kuning Mati");
Serial.println("Hijau Menyala");
digitalWrite(ledm, LOW);
digitalWrite(ledk, LOW);
digitalWrite(ledh, HIGH);
delay(2000);
}