// Define constants
const int potentiometerPin = A0; // Analog pin for potentiometer
const int ledPin = 9;           // PWM pin for LED

void setup() {
  pinMode(potentiometerPin, INPUT); // Set potentiometer pin as input
  pinMode(ledPin, OUTPUT);          // Set LED pin as output
}

void loop() {
  // Read the value from the potentiometer (0 to 1023)
  int potValue = analogRead(potentiometerPin);

  // Map the potentiometer value to the range of the LED brightness (0 to 255)
  int brightness = map(potValue, 0, 1023, 0, 255);

  // Set the brightness of the LED
  analogWrite(ledPin, brightness);

  // Optional: You can add a delay if needed
  // delay(10);
}