// Pin untuk LED
const int ledPins[] = {11, 10, 9};

// Pin untuk tombol
const int buttonPins[] = {A0, A1, A2};

int currentLED = 0;
int brightness[] = {0, 0, 0};

void setup() {
  Serial.begin(9600);

  for (int i = 0; i < 3; i++) {
    pinMode(ledPins[i], OUTPUT);
  }

  for (int i = 0; i < 3; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
}

void loop() {
  static bool initialPrint = true;
  if (initialPrint) {
    Serial.println("TombolMerah   : Pilih LED");
    Serial.println("TombolKuning  : (-) PWM LED");
    Serial.println("TombolHijau   : (+) PWM LED");
    Serial.print("LED terpilih  : ");
    Serial.println(currentLED + 1);
    initialPrint = false;
  }

  if (digitalRead(buttonPins[0]) == LOW) {
    currentLED = (currentLED + 1) % 3;
    Serial.print("LED terpilih  : ");
    Serial.println(currentLED + 1);
    delay(300); // Debouncing
  }

  if (digitalRead(buttonPins[1]) == LOW) {
    brightness[currentLED] = max(0, brightness[currentLED] - 1);
    printBrightness();
    delay(100); // Debouncing
  }

  if (digitalRead(buttonPins[2]) == LOW) {
    brightness[currentLED] = min(255, brightness[currentLED] + 1);
    printBrightness();
    delay(100); // Debouncing
  }

  for (int i = 0; i < 3; i++) {
    analogWrite(ledPins[i], brightness[i]);
  }
}

void printBrightness() {
  Serial.println("Kecerahan:");
  for (int i = 0; i < 3; i++) {
    Serial.print("LED ");
    Serial.print(i + 1);
    Serial.print(": ");
    Serial.println(brightness[i]);
  }
}