#define LED_PIN 3
#define POTENTIOMETER_PIN A7
void setup()
{
  pinMode(LED_PIN, OUTPUT);
  pinMode(POTENTIOMETER_PIN, INPUT);
  Serial.begin(9600);
}
void loop()
{
  int potentiometerValue = analogRead(POTENTIOMETER_PIN);
  Serial.println(potentiometerValue);
  int brightness = map(potentiometerValue,0,1023,0,255);
  analogWrite(LED_PIN, brightness);
}