int buttonPin = 2;
bool prevState = false;
int count = 0;

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(13, OUTPUT);
  Serial.begin(9600);
  bool prevState = !digitalRead(buttonPin);
}

void loop() {
  //Serial.println(count);
  bool buttonState = !digitalRead(buttonPin);

  if(buttonState && count < 15) {
    count++;
  } else if(!buttonState && count > 0) {
    count--;
  }

  if(buttonState != prevState && (count == 15 || count == 0)) {
    prevState = buttonState;
    if(buttonState) {
      Serial.println("Da");
    } else {
      Serial.println("Nope");
    }
  }
}