int buzzerpin=14;

void setup() {
  pinmode (buzzerpin, OUTPUT);
  serial.begin(9600);
  }

  void loop(){
    tone(buzzerpin,150);
    delay(1000);

    noTone(buzzerpin);
    delay(1000);

     tone(buzzerpin, 100, 1000);
     delay(2000);
  }