int echopin=11;
int trigpin=12;
int led=13;
long duration, distance;


void setup() {

  Serial.begin(9600);
  pinMode(echopin,INPUT);
  pinMode(trigpin,OUTPUT);
}

void loop() {
  digitalWrite(trigpin,LOW);
  delay(20);
  digitalWrite(trigpin,HIGH);
  delay(10);
  digitalWrite(trigpin,LOW);
  duration=pulseIn(echopin,HIGH);
 distance=(duration*0.0291)/2;
 if (distance>=0 && distance<=200)

 {

  Serial.println(distance);

 }

 else

{

Serial.println("Out Of Range");

}
}