#define LED_PIN 11
#define POTENTIOMETER_PIN A0

void setup()
{
    pinMode(LED_PIN, OUTPUT);
    Serial.begin(9600);
}

void loop()
{
    int potentiometerValue = analogRead(POTENTIOMETER_PIN);
    int brightness = map(potentiometerValue, 0, 1023, 0, 255);
    Serial.println(brightness);
    analogWrite(LED_PIN, brightness);
}