#include "Ultrasonic.h"

#define buzzer 2

Ultrasonic ultrasonic(12, 13);
int distance;

void setup() {
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  distance = ultrasonic.read();
  
  Serial.print("Distance in CM: ");
  Serial.println(distance);

  if(distance < 50){
    digitalWrite(buzzer, HIGH);
  } else {
    digitalWrite(buzzer, LOW);
  }
  delay(1000);
}