const int LED = 13; // Pin LED (D2)
const int BUTTON = 2; // Pin Push Button (D13)

void setup() {
  // Inisialisasi Serial Monitor
  Serial.begin(115200);
  Serial.println("Sistem Push Button dan LED");

  // Konfigurasi pin
  pinMode(LED, OUTPUT);
  pinMode(BUTTON, INPUT_PULLUP);
}

void loop() {
  // Baca status push button
  int buttonState = digitalRead(BUTTON);

  // Jika push button ditekan
  if (buttonState == LOW) {
    // Nyalakan LED
    digitalWrite(LED, HIGH);
    Serial.println("LED menyala!");
  } else {
    // Matikan LED
    digitalWrite(LED, LOW);
    Serial.println("LED mati.");
  }

  // Tunda selama 1000 milidetik
  delay(1000);
}