int button = 15 ;
int nilai_tombol ;
int led = 5 ;
void setup() {
 pinMode  (button , INPUT );
 pinMode   (led, OUTPUT );

}

void loop(){
  nilai_tombol = digitalRead (button);
  if (nilai_tombol == HIGH ){
   digitalWrite (led, HIGH );
} else {
  digitalWrite (led, LOW );
  }
}