const int LED_PIN = 11;
const int POT_PIN = A1;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(POT_PIN, INPUT); 
}

void loop() {
  int potValue = analogRead(POT_PIN);  
  int brightness = map(potValue, 0, 1023, 0, 255);
  analogWrite(LED_PIN, brightness);
  delay(10);
}