#define BUZZER_PIN 14

void setup() {
  pinMode(BUZZER_PIN, OUTPUT);
}

void loop() {
  tone(BUZZER_PIN, 1000); // play tone with frequency 1000Hz
  delay(500); // wait for 500ms
  noTone(BUZZER_PIN); // turn off the buzzer
  delay(500); // wait for 500ms
}