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


void setup(){
  // put your setup code here, to run 
  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.print("merah menyala");
Serial.print("kuning mati");
Serial.print("hijau mati");
delay(3000);
digitalWrite(ledm, LOW);
digitalWrite(ledk, HIGH);
digitalWrite(ledh, LOW);
Serial.print("kuning menyala");
Serial.print("hijau mati");
Serial.print("merah mati");
delay(2000);
digitalWrite(ledm, LOW);
digitalWrite(ledk, LOW);
digitalWrite(ledh, HIGH);
Serial.print("hijau menyala");
Serial.print("merah mati");
Serial.print("kuning mati");
delay(1000);

}