int ledPin = 11;      // select the pin for the LED

int brightness = 0;

// the setup routine runs once when you press reset:

void setup() {

  // declare the ledPin as an OUTPUT:

  pinMode(ledPin, OUTPUT);

  // initialize serial communication at 9600 bits per second:

  Serial.begin(9600);

}

// the loop routine runs over and over again forever:

void loop() {

  // read the input on analog pin 0:

  int sensorValue = analogRead(A0);

  // print out the value you read:

  //remap sensorValue from 0-1024 to 0-255

  brightness = map(sensorValue, 0, 1024, 0, 255);

  // set the brightness of pin 9:

  analogWrite(ledPin, brightness);

  Serial.println(brightness);

  delay(1);        // delay in between reads for stability

}