#include<Servo.h>
Servo myservo;
int potpin =A0;
int servopin = 3;

void setup() {
  // put your setup code here, to run once:
myservo.attach (servopin);
pinMode(potpin , INPUT);
pinMode( servopin , OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
int potvalue = analogRead(potpin);
potvalue = map( potvalue , 0 , 1023 , 0 , 180);
myservo.write(potvalue);
Serial.println(potvalue);
delay(20);
}