Write the next sentence in the following story.

How to build a folding screen
Gather 3 plantation-style shutters.
If buying new shutters, purchase 3 of the same size. If you're buying salvaged shutters, trim them so that they are uniform in size.
Lay the 3 shutters across 2 sawhorses with the top edges aligned. Clamp them together in several places so that they will not move while you do any necessary repairs.