For Karen Fish- since this is an old thread I thought I would help you out. Here are a few pattern links but if you type Double Irish Chain many will come up for you. You dont have to leave the space white either. Whatever will fit in your big square. I have see small star blocks or even a print fabric. Good luck dear!
https://www.generations-quilt-patter...t-pattern.html
https://www.quilterscache.com/D/Doub...hainBlock.html be sure and get the other pages