Larvae time-lapse setup

[Northern light channel]

Hi all,


I have seen plenty of small bugs around my yard lately, and I have become more and more interested in some moth larvae that I keep seeing, just feeding on leaves. I guess they will become pupae soon, and will finally evolve to full-sized moths.
I was thinking of taking a time-lapse of the whole process, but I am not sure of how should I do it:
Camera with ML set to take photos every 20 minutes (I plug the camera to the wall, and have no issues with amount of shots)
Tripod

BUT: how big should the transparent box be? The smaller it is, the easier it will be to have the little bug in the frame, but I am not sure on how to set the photo-booth... any help will be appreciated (and of course, I will post the video here!)