const int pin_S1 = 6 ; // input switch 1
const int pin_S2 = 7 ; // input switch 2
const int pin_LED = 8 ; // LED display
void setup() {
  pinMode(pin_S1, INPUT); //
  pinMode(pin_S2, INPUT);
  pinMode(pin_LED, OUTPUT);
  digitalWrite(pin_S1, HIGH); //internal pullup aktif
  digitalWrite(pin_S2, HIGH);//internal pullup aktif
  digitalWrite(pin_LED, LOW);

}

void loop() {

 // Jika ditekan S1 maka LED menyala
 if (digitalRead(pin_S1) == 0 && digitalRead(pin_S2) == 1 )
 {
  digitalWrite(pin_LED, HIGH);

} else //jika ditekan S2 maka LED padam

if(digitalRead(pin_S2) == 0 && digitalRead(pin_S1) == 1);
{
digitalWrite(pin_LED, LOW);

}
delay(300);// jeda 300ms

}