photocell with analog

//this one gives you a number fluctuation based on light intensity. high number = dark, low number = bright

int sensorPin = 4; // 220 or 1k resistor connected to this pin
long result = 0;

void setup() // run once, when the sketch starts
{
  Serial.begin(9600);
  Serial.println("start"); // a personal quirk
}

void loop() // run over and over again
{
  Serial.println(analogRead(0));
//  if (RCtime(sensorPin)>100){
//    Serial.println("there is bright light");
//    Serial.println(RCtime(sensorPin));
//  }
//  Serial.println( RCtime(sensorPin) );
//  delay(100);
}
long RCtime(int sensPin){
  long result = 0;
  pinMode(sensPin, OUTPUT); // make pin OUTPUT
  digitalWrite(sensPin, HIGH); // make pin HIGH to discharge capacitor - study the schematic
  delay(1); // wait a ms to make sure cap is discharged
  pinMode(sensPin, INPUT); // turn pin into an input and time till pin goes low
  digitalWrite(sensPin, LOW); // turn pullups off - or it won't work
  while(digitalRead(sensPin)){ // wait for pin to go low
    result++;
  }
  return result; // report results
}