#include <Ultrasonic.h>
const int TRIGGER_PIN = 14;
const int ECHO_PIN = 25;
const int ALERT_THRESHOLD = 50;
const int BUZZER_PIN = 12;


Ultrasonic ultrasonic(TRIGGER_PIN, ECHO_PIN);
int distance;

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

void loop() {
  distance = ultrasonic.read();
  if (distance < ALERT_THRESHOLD) {
    alertUser();
  }
  delay(100); // Adjust delay as needed
}

void alertUser() {
  tone(BUZZER_PIN, 1000); // Sound alert
  delay(500); // Alert duration
  noTone(BUZZER_PIN); // Stop alert
}