suggestions

hello i am new here, well currently my dad and i are building a new bedroom in our attic for me and there is going to be a "secret" closet that will have a light a a outlet. Hence i would like to make this into a grow room. The only problem is air circulation. Also if ya'll would like to help me with a list of materials I need that would be much appreciated.
thanks
the closet is 4x4x5

Hey Nick, we are gonna need more information on your closet, what size is it, ect. Before we can provide any help.

4x4x5
thanks