int photocellPin = 2;
int photocellReading;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  photocellReading = analogRead(photocellPin);
  Serial.print("Analogreading=");
  Serial.println(photocellReading);
  delay(1000);
}