#define  BUZZER_PIN 2

const int trigPin = 14;
const int echoPin = 5;
long duration;
int distance;

void setup() {
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2;
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println("  cm");

  
  if(distance <= 250) {
    digitalWrite(BUZZER_PIN, HIGH);
  }
  else{
    digitalWrite(BUZZER_PIN, LOW);
  }
  delay(1000);
  
}