void setup() {
  // put your setup code here, to run once:
  pinMode(8, OUTPUT);
  Serial.begin(9600);
  Serial.println("Selamat Datang");
  Serial.println("1. LED Merah Menyala");
  Serial.println("2. LED Merah Mati");
}

void loop() {
  // put your main code here, to run repeatedly:
  if (Serial.available() > 0) {
    int state = Serial.read();
    if (state == '1') {
      digitalWrite(8, HIGH);
      Serial.println("LED Merah Menyala");
    }
    else if (state == '2' ) {
      digitalWrite(8, LOW);
      Serial.println("LED Merah Mati");
    }
  }
}