Building a Photovore

Hey guys so I am very new to arduino software and might I add I am pretty bad with it, That said for one of my classes I have been told I have to build a photovore and was wondering if anyone could give me some coding for one as well as how to put it together. I have the basic arduino kit and it will be using DFRobotShop Rover V2 - Arduino Compatible Tracked Robot (

I suggest you google photovore. Once you have a plan, try things out, then ask for help as needed.