#define trigpin 3

#define echopin 2

void setup()

{

  Serial.begin(9600);

   pinMode(trigpin,OUTPUT);

   pinMode(echopin, INPUT);



}

void loop()

{

  int distance, duration;    //I even tried putting long instead of int

  digitalWrite(trigpin,HIGH);

  delayMicroseconds(10);

  digitalWrite(trigpin,LOW);

  while (digitalRead(echopin) == LOW) {
	//the controller will do nothing until the echo pin pauses
 }

 Serial.println("Clear");

  }