int buzzerPin = 7;

void setup() {
  // put your setup code here, to run once:
pinMode(buzzerPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
tone(buzzerPin, 150);
delay(1000);

noTone(buzzerPin);

delay(1000);

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