int led = 13;
int pinPot = 0;
int potVal = 0;

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
}
void loop() {
  potVal = analogRead(pinPot);
  Serial.println(potVal);
  potVal = map(potval, 0, 1023, 0, 255);
  analogWrite(led, potVal);
}