#include <Servo.h>
Servo myservo;
int servo_pin=11,potentiometer_pin=A0;
int position=0;
void setup() {
  myservo.attach(servo_pin);
  myservo.write(position);
}

void loop() {
  int value=analogRead(potentiometer_pin);
  position=map(value,0,1023,0,180);
  myservo.write(position);
  delay(20);
}