thanks for the picture, just what i was looking for
Note: Be sure to use vertical corner bracing, screws, and glue to achieve a rigid frame that can then be attached to a post, as shown, or a wall. I used 1-5/8" #6 Drywall screws and pre-drilled the holes. I also used Titebond II glue at each joint, with added vertical bracing at each corner to increase weight bearing capacity.