IDK

#include <Servo.h>

Servo myservo;

int servoPin = 13;
int potPin = 3;
int potVal;

void setup() {
  myservo.attach(servoPin);
}

void loop() {
  potVal = analogRead(potPin);
  potVal = map(potVal, 0, 1023, 0, 180);
  myservo.write(potVal);
  delay(15);
}