Thanks everyone. First I tried matching all the white, that soon got old. I had so many whites,from 4-14 inches with of fabric, I took the plung and used them. Each block has 2 light & 2 dark purple.Just did the last 3 blocks. Of course on the last one I cut a big slit with rotory cutter. Need to rip that out and replace. I do have extras. Now need to actually buy backing. Would it look odd to use different purple on the back as I want to try quilt as you go.