#include "Ultrasonic.h"
Ultrasonic sensor(8,9); // Trig et Echo
 
// defines variables
int distance; // variable for the distance measurement

void setup() {
  Serial.begin(9600);
  pinMode (11, OUTPUT);
  pinMode (12, OUTPUT);
}

void loop () {
  distance = sensor.Ranging(CM);
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  delay(100); // 100 ms
}