One Sensor, Sensing

This here is a light sensor, compliments of radio shack, giving me some feedback. Way to go, little sensor!

Here's the Arduino all wired up and ready to go	And here is a readout showing it's receiving
With light	Without light!

And here's the code:

int analogReading;  //variable int size because adc number potentially as big as 1024
int potPin = 0;    // Analog input pin that the potentiometer is attached to
int potValue = 0;   // value read from the pot
int led = 9;    // PWM pin that the LED is on.  n.b. PWM 0 is on digital pin 9
void setup()
{
   beginSerial(9600);  //set up communication back to pc
   //don't forget to press "serial monitor button"
}

void loop()
{
  analogReading = analogRead(0); //can only use pins 0-5
  Serial.println(analogReading); //talk back to pc
  
  potValue = analogRead(potPin); // read the pot value
  analogWrite(led, potValue/4);  // PWM the LED with the pot value (divided by 4 to fit in a byte)
  Serial.println(potValue);      // print the pot value back to the debugger pane
  delay(10);                     // wait 10 milliseconds before the next loop

}