void setup()
 {
  Serial.begin(9600);
  pinMode(11, INPUT);
  pinMode(10, OUTPUT);
 }
void loop() 
{
 digitalWrite(10, LOW);
 delayMicroseconds(10);
 digitalWrite(10, HIGH);
 delayMicroseconds(10);
 digitalWrite(10, LOW);
 int Echopulse = pulseIn(11, HIGH);
 Serial.print(Echopulse);
 Serial.println("microSec");
 delay(100);

}