const int PIN_LED = 13;    
const int PIN_TOMBOL = 2; 

void setup() {
  pinMode(2, INPUT_PULLUP);
  pinMode(13, OUTPUT);
}

void loop() {
  int statusTombol = digitalRead(2);
  if (statusTombol == LOW) {
    digitalWrite(13, HIGH); 
  } else {
    digitalWrite(13, LOW); 
  }
}