// Pin assignments
const int ledCount = 7;                 // Total number of LEDs
const int ledPins[ledCount] = {2, 3, 4, 5, 6, 7, 8}; // LED pins
const int state1Pin = 9;                 // Pin for state 1
const int state2Pin = 10;                // Pin for state 2
const int state3Pin = 11;                // Pin for state 3

int currentLedIndex = 0;                // To keep track of the current LED

void setup() {
  // Initialize LED pins as outputs
  for (int i = 0; i < ledCount; i++) {
    pinMode(ledPins[i], OUTPUT);
    digitalWrite(ledPins[i], LOW); // Turn off all LEDs
  }

  // Initialize state pins as inputs with pull-up resistors
  pinMode(state1Pin, INPUT_PULLUP);
  pinMode(state2Pin, INPUT_PULLUP);
  pinMode(state3Pin, INPUT_PULLUP);
}

void loop() {
  // Read the state of each button
  bool state1 = digitalRead(state1Pin) == LOW; // Active LOW
  bool state2 = digitalRead(state2Pin) == LOW; // Active LOW
  bool state3 = digitalRead(state3Pin) == LOW; // Active LOW

  // Turn off the current LED
  digitalWrite(ledPins[currentLedIndex], LOW);
  
  // Determine the next LED index based on the states
  if (state2) {
    currentLedIndex = (currentLedIndex + 1) % ledCount; // move to the next LED
  } else if (state3) {
    currentLedIndex = (currentLedIndex + 2) % ledCount; // move 2 positions ahead
  }
  // if state 1 is true (but no action taken), we simply do nothing

  // Turn on the current LED
  digitalWrite(ledPins[currentLedIndex], HIGH);

  // Optional: Wait for a short period to see the change
  delay(300); // Adjust the delay as necessary
}