const int ledPins[] = {14, 15, 2, 0, 4, 16, 17};  // LED Pins
const int buttonPins[] = {27, 26, 25, 33, 32, 35, 34}; // Button Pins
const int numButtons = 7;

void setup() {
  for (int i = 0; i < numButtons; i++) {
    pinMode(ledPins[i], OUTPUT);
    pinMode(buttonPins[i], INPUT_PULLUP); // Use internal pull-up resistors
  }
}

void loop() {
  int pressedButton = -1;
  
  // Check which button is pressed, starting from highest priority
  for (int i = 0; i < numButtons; i++) {
    if (digitalRead(buttonPins[i]) == LOW) { // Button is pressed
      pressedButton = i;
      break; // Exit loop once the highest priority button is found
    }
  }

  // Control LEDs based on the pressed button
  for (int i = 0; i < numButtons; i++) {
    if (i <= pressedButton) {
      digitalWrite(ledPins[i], HIGH);
    } else {
      digitalWrite(ledPins[i], LOW);
    }
  }
}