Lucky mistake
I was setting my blocks on point. I thought I knew what size to cut my side triangles. Of course I cut them about 2.5 inches too small. I tried to find more fabric, no luck. My friend suggested I just sew a 2.5 inch strips of a dark fabric onto my off white triangles. When I tried this I had a built in birder with the corners of my blocks jutting out into my borders. It looks like I spent a lot of time & effort into doing this. I will surly will be doing this again. Sorry I gifted the quilt before I remembered to take a picture.