// Parallel Transmission 8 LED
const int ledPins[8] = {2,3,4,5,6,7,8,9};
const int buttonPin = 10;

void setup() {
  for(int i=0; i<8; i++){
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(buttonPin, INPUT); // Tanpa pull-down
}

void loop() {
  int buttonState = digitalRead(buttonPin);

  if(buttonState == HIGH){
    // Kirim data 10101010
    digitalWrite(ledPins[0], HIGH); // pin2 -> 1
    digitalWrite(ledPins[1], LOW);  // pin3 -> 0
    digitalWrite(ledPins[2], HIGH); // pin4 -> 1
    digitalWrite(ledPins[3], LOW);  // pin5 -> 0
    digitalWrite(ledPins[4], HIGH); // pin6 -> 1
    digitalWrite(ledPins[5], LOW);  // pin7 -> 0
    digitalWrite(ledPins[6], HIGH); // pin8 -> 1
    digitalWrite(ledPins[7], LOW);  // pin9 -> 0
  } else {
    // Matikan semua LED
    for(int i=0; i<8; i++){
      digitalWrite(ledPins[i], LOW);
    }
  }
}