void setup() {
  // put your setup code here, to run once:
pinMode(2, OUTPUT);
pinMode(8, INPUT_PULLUP);
}

void loop() {
  // put your man code here, to run repeatedly:
 // mendeklarasikan variabel
 //untuk membaaca keadaan tombol
bool tombol;
bool lampu;

 //membaca keadaan tombol
 //jika saklar ditekan, variabel tombol bernilai LOW
 //jika saklar tidak ditekan,variabel tombol bernilai HIGH
tombol= digitalRead(8);
lampu = digitalRead(2);

if (tombol == LOW) {
  if (tombol == LOW) 
  digitalWrite(2, HIGH);
}
else {
  digitalWrite(2, LOW);
}
}