void setup() {
  // put your setup code here, to run once:
  pinMode(13, OUTPUT);
  pinMode(4, INPUT);
}

void loop() {
  int tombol = digitalRead(4);
  if(tombol == 1){
  // put your main code here, to run repeatedly:
  digitalWrite(13, HIGH); // this speeds up the simulation
  }
  else {
  digitalWrite(13, LOW);
  }
  delay(10);
}