Step 4: Close it Up, You're Done!
We're basically out of the woods now. Congratulations! There will be cake and grief counseling at the conclusion of this Instructable.
Put double sided tape on the cardboard piece. You have to be more careful here, because you don't want to get it on the handle piece. What I did was have it hang waaaay off the edge, and cut off the excess. Be careful not to disturb the handle though: it's very irritable.
Now all you need to do is stick the front piece of paper onto the cardboard, making sure they're lined up nicely. You're done! You've been a very good test subject. Please proceed to the next test chamber.
Thanks for reading, hope you enjoy. If you have any ideas on how to make this better/more efficiently, please let me know. Oh, and if anyone is interested in seeing a version that opens the aperture, instead of closing it, let me know in the comments.