const int segments[] = {2, 3, 4, 5, 6, 7, 8}; // A to G
const int buttonPin = 9;

int counter = 0;
bool prevButtonState = LOW;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;
unsigned long holdInterval = 500;
unsigned long lastHoldTime = 0;

const byte hexDigits[16] = {
  0b00111111, // 0
  0b00000110, // 1
  0b01011011, // 2
  0b01001111, // 3
  0b01100110, // 4
  0b01101101, // 5
  0b01111101, // 6
  0b00000111, // 7
  0b01111111, // 8
  0b01101111, // 9
  0b01110111, // A
  0b01111100, // b
  0b00111001, // C
  0b01011110, // d
  0b01111001, // E
  0b01110001  // F
};

void setup() {
  for (int i = 0; i < 7; i++) {
    pinMode(segments[i], OUTPUT);
    digitalWrite(segments[i], LOW); // Ortak katot için
  }
  pinMode(buttonPin, INPUT);
}

void displayDigit(byte val) {
  byte bits = hexDigits[val % 16];
  for (int i = 0; i < 7; i++) {
    digitalWrite(segments[i], bitRead(bits, i));
  }
}

void loop() {
  bool buttonState = digitalRead(buttonPin);
  unsigned long currentTime = millis();

  // Düğmeye yeni basıldıysa
  if (buttonState == HIGH && prevButtonState == LOW && (currentTime - lastDebounceTime) > debounceDelay) {
    counter = (counter + 1) % 16;
    displayDigit(counter);
    lastDebounceTime = currentTime;
    lastHoldTime = currentTime;
  }

  // Düğme basılı tutuluyorsa
  if (buttonState == HIGH && (currentTime - lastHoldTime) > holdInterval) {
    counter = (counter + 1) % 16;
    displayDigit(counter);
    lastHoldTime = currentTime;
  }

  prevButtonState = buttonState;
}