const int buttonPin = 2;    // nupu pin
const int ledPin = 9;       // LED pin
const int buzzerPin = 8;    // buzzeri pin
const int buzzerFreq = 1000; // buzzeri sagedus 1000 Hz

bool ledState = LOW;
unsigned long previousMillis = 0;
const long interval = 500; // LED vilkumise intervall (500 ms)

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  int buttonState = digitalRead(buttonPin);

  if (buttonState == LOW) { // Kui nupp on alla vajutatud
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis >= interval) {
      previousMillis = currentMillis;
      ledState = !ledState; // vaheta LED-i olekut
      digitalWrite(ledPin, ledState);
    }
    tone(buzzerPin, buzzerFreq); // käivita buzzer sagedusega 1000 Hz
  } else {
    digitalWrite(ledPin, LOW);  // Lülita LED välja
    noTone(buzzerPin);           // Peata buzzer
  }
}