//deklarasi variabel (tipe data, nama variabel, nilai awal)
int dataku=0;

void setup(){
  pinMode(13, OUTPUT);
  Serial.begin(9600);
  Serial.println("Lebokno 1 nggo nggawe LED nyala ro 2 nggo mateni");
}

void loop(){
  //menguji apakah ada data di serial
  if(Serial.available()){
    dataku = Serial.parseInt();
    Serial.print("Sampean ngelebokke : ");
    Serial.println(dataku);
  }

  if(dataku==1){
    digitalWrite(13, HIGH);
  }

  if(dataku==2){
    digitalWrite(13, LOW);
  }
}