const int trigPin = 18;
const int echoPin = 19;
long duration;
int distance;
void setup() {
  pinMode(12, OUTPUT);
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

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>=350)
   {
    digitalWrite(12, LOW);
    Serial.println("OBJECT NEARER");
   }
   else if(distance>=150)
   {
    digitalWrite(12, HIGH);
    Serial.println("OBJECT IS LONGER");
   }

 
  delay(100);
}