int nilai_saklar1 = 0;
int nilai_saklar2 = 0;

void setup () {
Serial.begin(9600);
pinMode(8,OUTPUT); //Led
pinMode(2, INPUT_PULLUP); //saklar1
pinMode(4, INPUT_PULLUP); //saklar2
}

void loop() {

nilai_saklar1 = !digitalRead (2) ;
nilai_saklar2 = !digitalRead (4) ;
Serial.print(nilai_saklar1);
Serial.print(nilai_saklar2);
delay(100);


if (nilai_saklar1==1 && nilai_saklar2==1) {
  digitalWrite(8, LOW);
}
else{
  digitalWrite(8, HIGH);
}
}