int ledPins[] = {5, 2, 3, 4};  
// 0 = LED tetap hidup
// 1 = kiri, 2 = tengah, 3 = kanan

void setup() {
  for (int i = 0; i < 4; i++) {
    pinMode(ledPins[i], OUTPUT);
    digitalWrite(ledPins[i], LOW);
  }
  digitalWrite(ledPins[0], HIGH); // LED0 selalu hidup
}

void loop() {
  ceremonyEpic();
  while (true); // selesai, semua LED tetap hidup
}

void ceremonyEpic() {
  // --- Intro: dua kali gebukan berat ---
  for (int i = 0; i < 2; i++) {
    digitalWrite(ledPins[1], HIGH);
    digitalWrite(ledPins[3], HIGH);
    delay(600);
    digitalWrite(ledPins[1], LOW);
    digitalWrite(ledPins[3], LOW);
    delay(400);
  }

  // --- Build-up: tempo makin cepat ---
  int steps = 12;  
  for (int i = 0; i < steps; i++) {
    int delayTime = map(i, 0, steps - 1, 350, 120); 
    // awal 350 ms → akhir 120 ms

    // kiri+kanan bareng
    digitalWrite(ledPins[1], HIGH);
    digitalWrite(ledPins[3], HIGH);
    delay(delayTime);
    digitalWrite(ledPins[1], LOW);
    digitalWrite(ledPins[3], LOW);

    // tengah sebagai aksen
    digitalWrite(ledPins[2], HIGH);
    delay(delayTime / 2);  
    digitalWrite(ledPins[2], LOW);
    delay(delayTime / 2);
  }

  // --- Variation sebelum klimaks ---
  for (int i = 0; i < 4; i++) {
    // kiri+kanan+ tengah nyala bergantian
    digitalWrite(ledPins[1], HIGH); delay(100); digitalWrite(ledPins[1], LOW);
    digitalWrite(ledPins[2], HIGH); delay(150); digitalWrite(ledPins[2], LOW);
    digitalWrite(ledPins[3], HIGH); delay(100); digitalWrite(ledPins[3], LOW);
  }
  delay(500);
   digitalWrite(ledPins[1], LOW);
    digitalWrite(ledPins[2], LOW);
   digitalWrite(ledPins[3], LOW);

  // // --- Finale: gebukan besar ---
  // for (int j = 0; j < 3; j++) {
  //   for (int i = 1; i < 4; i++) digitalWrite(ledPins[i], HIGH);
  //   delay(400 - j * 100); // 400 → 300 → 200 ms
  //   for (int i = 1; i < 4; i++) digitalWrite(ledPins[i], LOW);
  //   delay(200);
  // }

  // --- Ending: semua hidup permanen ---
  for (int i = 1; i < 4; i++) {
    digitalWrite(ledPins[i], HIGH);
  }
}