// LED
const int ledHijau = 8;
const int ledKuning = 9;
const int ledMerah = 10;

// Tombol dan Potensiometer
const int tombol = 2;
const int potPin = A0;

bool modeAlarm = false;

void setup() {
  pinMode(ledHijau, OUTPUT);
  pinMode(ledKuning, OUTPUT);
  pinMode(ledMerah, OUTPUT);
  pinMode(tombol, INPUT_PULLUP);
}

void loop() {

  // Aktifkan mode alarm jika tombol ditahan 5 detik
  if (digitalRead(tombol) == LOW) {
    unsigned long mulai = millis();

    while (digitalRead(tombol) == LOW) {
      if (millis() - mulai >= 5000) {
        modeAlarm = !modeAlarm;
        delay(500);
        break;
      }
    }
  }

  // MODE ALARM
  if (modeAlarm) {
    digitalWrite(ledHijau, HIGH);
    digitalWrite(ledKuning, HIGH);
    digitalWrite(ledMerah, HIGH);
    delay(300);

    digitalWrite(ledHijau, LOW);
    digitalWrite(ledKuning, LOW);
    digitalWrite(ledMerah, LOW);
    delay(300);

    return;
  }

  // Baca potensiometer
  int nilaiPot = analogRead(potPin);

  // Matikan semua LED dulu
  digitalWrite(ledHijau, LOW);
  digitalWrite(ledKuning, LOW);
  digitalWrite(ledMerah, LOW);

  // Kondisi 1
  if (nilaiPot < 300) {
    digitalWrite(ledMerah, HIGH);
  }

  // Kondisi 2
  else if (nilaiPot >= 300 && nilaiPot <= 700) {
    digitalWrite(ledKuning, HIGH);
  }

  // Kondisi 3
  else {
    digitalWrite(ledHijau, HIGH);
  }

  delay(100);
}