int led = 13;
int tombol = 0;
void setup( ) {

pinMode (led, OUTPUT);
pinMode (tombol, INPUT_PULLUP);
  // put your main code here, to run repeatedly:


void loop () {
  // put your main code here, to run repeatedly:
int baca = digitalRead(tombol);
if (baca==LOW){
digitalWrite(led, HIGH);
}
if (baca==HIGH) {
  digitalWrite (led, LOW);
}
}