// BUZZER FUNCTION

# define buzzerPin 13

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

void loop() {
  // put your main code here, to run repeatedly:
  buzzer_sound();
}

//make the buzzer active.
void buzzer_sound(){
  tone(buzzerPin, 400);
  delay(1000);
  noTone(buzzerPin);
  delay(1000);
}