const int ledPins[] = {3, 4, 5, 6};  // LED pins
const int tombol = 2;  // Push button pin
const int potensio = A0;  // Potentiometer pin

int potValue = 0;  // Potentiometer value
bool tombolDitekan = false;  // Button press flag
bool arahLed = true;  // LED direction flag (true: left to right, false: right to left)
bool statusLed = false;  // LED state flag (true: LEDs are on, false: LEDs are off)
bool arahSebelumnya = true;  // Previous LED direction flag
bool arahBerubah = false;  // Flag to indicate direction change

void setup() {
  for (int i = 0; i < 4; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(tombol, INPUT);
  Serial.begin(9600);
}

void loop() {
  potValue = analogRead(potensio);

  // supaya tombol bisa sekali pencet
  if (digitalRead(tombol) == HIGH && !tombolDitekan) {
    tombolDitekan = true;
    if (potValue > 300) {
      if (arahBerubah) {
        arahLed = !arahLed;
        arahBerubah = false;
      }
      statusLed = !statusLed;  // efek toogle dari led
    }
  }

  // pengecekan kondisi dari nilai potensio
  if (potValue > 300 && potValue <= 800) {
    // kontrol potensio untuk led kiri-kanan
    if (arahSebelumnya != true) {
      arahBerubah = true;
      statusLed = false;
    }
    arahSebelumnya = true;
  } else if (potValue > 800) {
    // kontrol potensio untuk led kanan-kiri
    if (arahSebelumnya != false) {
      arahBerubah = true;
      statusLed = false;
    }
    arahSebelumnya = false;
  } else {
    // matiin led
    statusLed = false;
  }

  // kondisi led
  if (statusLed) {
    if (arahLed) {
      // nyalain led dari kanan ke kiri
      for (int i = 0; i < 4; i++) {
        digitalWrite(ledPins[i], HIGH);
        delay(50); // delay for each LED
        digitalWrite(ledPins[i], LOW);
        delay(50); // delay between LEDs
      }
    } else {
      // nyalain led dari kanan ke kiri
      for (int i = 3; i >= 0; i--) {
        digitalWrite(ledPins[i], HIGH);
        delay(50); // delay for each LED
        digitalWrite(ledPins[i], LOW);
        delay(50); // delay between LEDs
      }
    }
  } else {
    // matiin led
    for (int i = 0; i < 4; i++) {
      digitalWrite(ledPins[i], LOW);
    }
  }

  // cetak potensio dan tombol di serial monitor
  Serial.print("Potentiometer value: ");
  Serial.print(potValue);
  Serial.print(" | Button state: ");
  Serial.println(digitalRead(tombol));

  // reset led mati
  if (digitalRead(tombol) == LOW) {
    tombolDitekan = false;
  }
  delay(100); // delay untuk serial print
}