//Want to set a variable for photoCell and set it to map to A0
    int photoCellPin = A0;

    //Create a varibale to store readings from the photoCell
    int photoCellReading = 0;

    //Set a varible for LED that maps to D0
    int ledPin = D0;

    //threshold of being covered
    int threshold = 3000;

    //Create a varible that will track and store brightness of the LED
     int ledBrightness = 0;

     //Define LED on pin D1
     int ledPIR = D1;

     //Define the PIR sensor on D7;
     int PIR = D7;

     //store PIR readings
     int PIRReading = 0;
     int pirState = LOW;             // we start, assuming no motion detected
     int val = 0;                    // variable for reading the pin status

     int calibrateTime = 1000;  // wait for calibration

     //track publishing process
     bool published;

     long publishTimeout = 60000;
     long lastPublishTime = -60000;

 void setup ()
 {
   //Configure D0 pin as output
   pinMode (ledPin, OUTPUT);

   //create a cloud variable interger called light that is mapped to the photoCellReading
   Particle.variable("light", &photoCellReading, INT);

   Serial.begin(9600);

   // set ledPIR pin to output
   pinMode(ledPIR, OUTPUT);

   //set ledPIR pin to input
   pinMode(PIR, INPUT);

   //ledPIR is on
   digitalWrite(ledPIR, HIGH);

   //ledPir is off
   digitalWrite(ledPIR, LOW);

   // set the timezone to EST!!!
   Time.zone( -5 );

   Serial.begin( 9600) ;

 }

 void loop ()
 {

   //Use the analogRead to provide photoCellReading
   photoCellReading = analogRead(photoCellPin);


   if(photoCellReading < threshold){
     digitalWrite(ledPin, HIGH);
   }else{
     digitalWrite(ledPin, LOW);
   }
   Serial.print("Analog reading = ");
   Serial.println(photoCellReading);

   //Make LED brighter, the darker the sensor is
   photoCellReading = 4095 - photoCellReading;

   //ledBrightness = map( photoCellReading, 0, 4095, 0 , 255 );

   //fade LED to desired brightness
   //analogWrite(ledPin, ledBrightness);

   //wait for x seconds and then loop
   //delay(100);

    //motion detection, then turn LED on as an indicator
    // if the sensor is calibrated
    if ( calibrated() )
    {
      Serial.println( "calibrated and reading" ) ;

    // get the data from the sensor
      readTheSensor();

      // report it out, if the state has changed
      reportTheData();
    }


    //wait for 5 seconds delay before reading again
    delay(500);
}



void readTheSensor() {
  val = digitalRead(PIR);
}

bool calibrated() {
  return millis() - calibrateTime > 0;
}

void reportTheData() {

  // if the sensor reads high
  // or there is now motion
  if (val == HIGH) {
      Serial.println( "there's motion" ) ;

    // the current state is no motion
    // i.e. it's just changed
    // announce this change by publishing an eent
    if (pirState == LOW) {
        Serial.println( "changed" ) ;
      // we have just turned on
      // Update the current state
      pirState = HIGH;

      if (Time.hour()>=6 && Time.hour()<=18 && (lastPublishTime + publishTimeout) < millis() ){
        Serial.println( "announcing" ) ;
        Particle.publish("kpanchma/s16/motion", "You've Got Mail");
        lastPublishTime = millis();
      }

    }


  } else {
    if (pirState == HIGH) {
      Serial.println( "used to be high" ) ;
      // we have just turned of
      // Update the current state
      pirState = LOW;
    }
  }

  digitalWrite( ledPIR , pirState );
}