const int tombol [4] = {2,3,4,5};
const int lampu [4] = {8,9,10,11};

void setup() {
  for(int i=0; i<4; i++){
    pinMode(lampu[i], OUTPUT);
  }

  for(int i=0; i<4; i++){
    pinMode(tombol[i], INPUT);
  }

  for(int i=0; i<4; i++){
    digitalWrite(tombol[i], HIGH);
  }
}

void loop() {
  for(int i=0; i<4; i++)
  if(digitalRead(tombol[i]) == LOW){
    digitalWrite(lampu[i], HIGH);
  }
  else {
    digitalWrite(lampu[i], LOW);
  }
}