{Post 1,534} Backing Pieced for Exploding Star

I am making a quilt as a surprise for a new friend. I wanted to use up some brushed cottons I had, but I did not have enough of one piece, or two...

So I copied a pattern of sorts that I saw on Pinterest for the back. It is not as striking as I thought it would be, but it will work. The quilt top is about 78" square. This back is 84" x 90". I am going to start the machine quilting now.

Here is the quilt top...

I have since added another top and left vertical row. Pictures to come of the machine quilting in progress.