const int btnOn = 4, btnOff = 18, led = 42;

void setup() {
  pinMode(btnOn, INPUT_PULLUP);
  pinMode(btnOff, INPUT_PULLUP);
  pinMode(led, OUTPUT);
  digitalWrite(led, LOW);

  Serial.begin(115200);
  Serial.println("Program Kontrol LED Dimulai");
  Serial.println("Tombol 1: Nyalakan LED");
  Serial.println("Tombol 2: Matikan LED");
}

void loop() {
  if (!digitalRead(btnOn)) {
    digitalWrite(led, HIGH);
    Serial.println("Tombol 1 ditekan - LED MENYALA");
    delay(200);
  }

  if (!digitalRead(btnOff)) {
    digitalWrite(led, LOW);
    Serial.println("Tombol 2 ditekan - LED PADAM");
    delay(200);
  }
}