const int buttonPin = 2; // Pin for the button
const int buzzerPin = 8; // Pin for the buzzer

int pressCount = 0;
bool lastButtonState = HIGH;

void setup() {
  // Use internal pull-up resistor (no external resistor needed)
  pinMode(buttonPin, INPUT_PULLUP); 
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  bool currentButtonState = digitalRead(buttonPin);

  // Check for button press (transition from HIGH to LOW)
  if (lastButtonState == HIGH && currentButtonState == LOW) {
    pressCount++;
    delay(50); // Debounce delay to prevent false triggers

    if (pressCount == 1) {
      tone(buzzerPin, 1000, 200); // Short signal
    } 
    else if (pressCount == 2) {
      tone(buzzerPin, 2000, 800); // Long signal
    } 
    else if (pressCount == 3) {
      tone(buzzerPin, 1500, 100); // Double signal
      delay(150);
      tone(buzzerPin, 1800, 100);
    } 
    else if (pressCount >= 4) {
      pressCount = 1; 
      tone(buzzerPin, 1000, 200);
    }
  }
  lastButtonState = currentButtonState;
}