#include "Servo.h"

Servo myservo;

void setup() {
  myservo.attach(2);  // attaches a servo connected to pin 2
}

void loop() {
  if (myservo.attached()) {  // If the servo is attached
    // position the servo angle at 90 degrees
    myservo.write(90);      
    myservo.detach();  // detach the servo motor
  }
}