#include <Servo.h>
Servo myservo;  // create servo object to control a servo

int potpin = A0;  // analog pin used to connect the potentiometer
int val;          // variable to read the value from the analog pin


void setup() 
{
  myservo.attach(9);    // attaches the servo on pin 9 to the servo object
  Serial.begin(9600);   // begin serial communication 
}

void loop() 
{
  val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023)
  val = map(val, 0, 1023, 0, 180);     // scale it to use it with the servo (value between 0 and 180)
  myservo.write(val);                  // sets the servo position according to the scaled value
  delay(20);                           // waits 20 milliseconds for the servo to get there
  int pos = myservo.read();            // read position of the motor
  Serial.println(pos);                 // ptint the position 
  delay (250);                         // waits 250 milliseconds
}