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, 500, 1500);
  delay(500);

  noTone(buzzerPin);

  delay(500);

  tone(buzzerPin, 400, 1500);
  delay(1500);
}