#define LED_PIN     21
#define BUTTON_PIN  5

int hitungTekan = 0;
bool nyalaLED = false;

unsigned long waktuDebounce = 0;
const unsigned long jedaDebounce = 50;

int tombolTerakhir = LOW;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT); 
  digitalWrite(LED_PIN, LOW);
  Serial.begin(115200);
}

void loop() {
  int tombolSekarang = digitalRead(BUTTON_PIN);

  
  if (tombolSekarang != tombolTerakhir && (millis() - waktuDebounce) > jedaDebounce) {
    waktuDebounce = millis();
    tombolTerakhir = tombolSekarang;

    if (tombolSekarang == HIGH) {
      if (hitungTekan < 5) {
        hitungTekan++;
        Serial.print("Tombol ditekan ke-");
        Serial.println(hitungTekan);

        if (hitungTekan == 5) {
          nyalaLED = true;
          Serial.println("LED ON!");
        }
      } else {
        Serial.println("Sudah 5 kali, counter tidak bertambah.");
      }
    }
  }

  digitalWrite(LED_PIN, nyalaLED);
}