Now take one of the flaps and hold it up and bend at the fold . The flaps should fold in on each forming the box. Do this first so you know where each piece goes.
Now lay it flat and turn the paper with design side up. Coat the corner flap with glue. you will glue each corner and fold it in the same way you did when folded it together without the glue. As you glue you may want paper use a paper clip to secure the each side box while it dries or hold it in place a few minutes until it sets up.
Repeat all the way until all four corners are done. You now have a box.
For more information look at the follow the photos.