Cheap and quick spray booth

I had a little free time on my hands today and with the weather I have not been able to spray primer my models. I took this opportunity to create a quick spray booth for when the weather warms up above freezing.

I took a cardboard box and cut the top flaps off.

I then flipped it on its long side down I cut down each edge of the new top so it acts as

A flap.

With the two long original flaps I cut off for the top I cut them into two angular pieces
to create a rise in the new top.

Then I glued and taped it together.

Here are some picture of the booth: