#include "Ultrasonic.h"
#include <Servo.h>
Ultrasonic ultrasonic(3, 2); // Trig et Echo
Servo myservo;

void setup() {
  Serial.begin(9600);
  // Attach servo on pin 9 to the servo object
  myservo.attach(9);
  myservo.write(180);
}

void loop () {
  int dist = ultrasonic.Ranging(CM);
  Serial.println(dist);
  //Serial.println(" cm");
  if (dist<30)
  {  myservo.write(90);} 
  else 
  {  myservo.write(180);} 
  delay(500);
}