Outcome

The prototype is almost complete. Everything is working fine as shown below in the video. However, I had a little difficulty with the code, probably has to do the the servo motor I used. I wasn't able to calibrate the light reading at which the servo will rotate. 

Next steps: 

1) Try with a high torque DC motor with a real curtain and connect it to an external power source. 

2)  Try the light sensor at an actual window and calibrate the readings for the actual sun light intensity

3) Design mechanical components that will help with the actual pulling of the curtain, but this should be a simple step, it will pretty much look like the one in this sample project: https://community.particle.io/t/wi-fi-curtains-with-the-photon/15145

Parts Used:

1) Bread Board

2) Photon Particle

3) wires

4) Servo Motor

5) photo resistor 

6) jumping wires

7) 10 Ohm resistors