const int ledPins[] = {3, 5, 6, 9, 10, 11};
const int numLeds = sizeof(ledPins) / sizeof(int);

const int xPin = A0;
const int yPin = A1;
const int buttonPin = 2;

int activeLed = 0;
int brightness = 125;
bool buttonPressed = false;

void setup() {
  for (int i = 0; i < numLeds; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  static unsigned long lastReadTime = 0;
  if (millis() - lastReadTime >= 100) {
    lastReadTime = millis();
    
    readJoystick();
    updateLEDs();
  }
}

void readJoystick() {
  int xValue = analogRead(xPin);
  int yValue = analogRead(yPin);
  bool buttonState = digitalRead(buttonPin);

  if (xValue > 600 || xValue < 400) {
    if (xValue > 600 && activeLed < numLeds - 1) {
      activeLed++;
    } else if (xValue < 400 && activeLed > 0) {
      activeLed--;
    }
  }

  if (yValue > 600) {
    if (brightness < 250) {
      brightness += 10;
    }
  } else if (yValue < 400) {
    if (brightness > 0) {
      brightness -= 10;
    }
  }

  if (!buttonState && !buttonPressed) {
    activeLed = 0;
    buttonPressed = true;
  } else if (buttonState && buttonPressed) {
    buttonPressed = false;
  }
}

void updateLEDs() {
  for (int i = 0; i < numLeds; i++) {
    analogWrite(ledPins[i], 0);
  }
  
  analogWrite(ledPins[activeLed], brightness);
}