void setup() {
  Serial.begin(9600);
  pinMode(13, OUTPUT);
  Serial.println();
  //Serial.println("SMKN 1 BANYUSARI");

}

void loop() {
  if (Serial.available()){
    int status = Serial.parseInt();

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

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

}