I had a couple of requests for a tutorial on mitered corners. I haven't done a tutorial before so hopefully this will work. I did want to mention that when putting several blocks together in my flower quilt with shadow box borders I kept the darker color on the top & left side & the lighter color on the bottom & rt side. It doesn't matter which side you choose as long as you are consistent throughout the quilt so that you get the shadow effect. Also I tried to keep most of my flowers going up (although there is no right or wrong way to do that...It's just what I chose to do). So I had to watch the direction I wanted my flowers to be before adding the shadow box borders. Hope this works