int potPin = A0;
int ledPin = 9;
int potValue = 0;
int ledValue = 0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  potValue = analogRead(potPin);
  ledValue = map(potValue, 0, 1023, 0, 255);
  
  analogWrite(ledPin, ledValue);
  
  Serial.print("Potentiometer: ");
  Serial.print(potValue);
  Serial.print(" LED: ");
  Serial.println(ledValue);
  
  delay(100);
}