// Define pin numbers
const int ledPins[] = {33, 25, 26, 27};  // Pins for LEDs
const int potentiometerPin = A0;          // Analog pin for potentiometer
const int buttonPin = 2;                  // Digital pin for button

// Define variables
int ledState[] = {LOW, LOW, LOW, LOW};    // Current LED states (LOW = off, HIGH = on)
int currentLed = 0;                       // Current LED index
int potValue = 0;                         // Potentiometer value (0-4095)
int mappedDelay = 0;                      // Mapped delay value (50-500)
bool clockwise = true;                    // LED rotation direction

void setup() {
  // Initialize pins
  for (int i = 0; i < 4; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(buttonPin, INPUT_PULLUP);  // Enable internal pull-up resistor for button
}

void loop() {
  // Read the potentiometer value
  potValue = analogRead(potentiometerPin);
  
  // Map the potentiometer value to the desired delay range
  mappedDelay = map(potValue, 0, 4095, 50, 500);
  
  // Turn on the current LED
  digitalWrite(ledPins[currentLed], HIGH);
  delay(mappedDelay);  // LED on time
  
  // Turn off the current LED
  digitalWrite(ledPins[currentLed], LOW);
  delay(mappedDelay);  // LED off time
  
  // Change LED direction if the button is pressed
  if (digitalRead(buttonPin) == LOW) { // Button press detected
    // Turn off all LEDs for 500ms
    for (int i = 0; i < 4; i++) {
      digitalWrite(ledPins[i], LOW);
    }
    delay(500);
    
    // Change rotation direction
    clockwise = !clockwise;
    
    // Determine the next LED index based on rotation direction
    if (clockwise) {
      currentLed = (currentLed + 1) % 4; // Move to the next LED in a clockwise direction
    } else {
      currentLed = (currentLed + 3) % 4; // Move to the next LED in an anti-clockwise direction
    }
  } else {
    // Move to the next LED in the current direction
    if (clockwise) {
      currentLed = (currentLed + 1) % 4; // Move to the next LED in a clockwise direction
    } else {
      currentLed = (currentLed + 3) % 4; // Move to the next LED in an anti-clockwise direction
    }
  }
}