// Import the necessary libraries
#include <Ultrasonic.h>

// Define the pins for the ultrasonic sensor
const int trigPin = 4;
const int echoPin = 5;

// Create an ultrasonic sensor object
Ultrasonic ultrasonic(trigPin, echoPin);

// Define the buzzer pin
const int buzzerPin = 1;
const int led1=2;
const int led2=3;


void setup() {
  // Set the buzzer pin as output
  pinMode(buzzerPin, OUTPUT);
}

void loop() {

  // Get the distance from the ultrasonic sensor
  float distance = ultrasonic.read();
  Serial.print("Distance is: ");
  Serial.print(distance);
  Serial.println("cm");

  // If the distance is less than 10 cm, turn on the buzzer
  if (distance < 10) {

    digitalWrite(led2, HIGH);
    tone(buzzerPin,600);
  } else {
    digitalWrite(buzzerPin, LOW);
    digitalWrite(led2, LOW); 
    digitalWrite(led1, HIGH); 

  }
  delay(500);
}