#include <Servo.h>

Servo myServo;

int const potPin = A0;
int potRawVal;
int servoAngle = 0;

void setup() {
  // put your setup code here, to run once:
  myServo.attach(9);

  Serial.begin(9600);

  myServo.write(servoAngle);
}

void loop() {
  // put your main code here, to run repeatedly:

  delay(250);
  
  potRawVal = analogRead(potPin);

  Serial.print("Raw servo value: ");
  Serial.println(potRawVal);

  servoAngle = map(potRawVal, 0, 1023, 0, 179);
  Serial.print("Servo angle: ");
  Serial.println(servoAngle);

  myServo.write(servoAngle);

  delay(250);
}