#include <Servo.h>

Servo myservo;
int position = 0;
int potValue = 0;

const byte servoPin = 10;
const byte ledPin = 9;
const byte potentiometerPin = 0;  

void setup() {
  myservo.attach(servoPin);
  pinMode(ledPin, OUTPUT);
}

void loop() {
potValue = analogRead(potentiometerPin); 
for(position = 0; position <= 180; position++){
  myservo.write(position);
  delay(potValue);
}

digitalWrite(ledPin, HIGH);
delay(500);
digitalWrite(ledPin, LOW);

for(position = 180; position >= 0; position--){
  myservo.write(position);
  delay(potValue/5);
}

}