I started with these materials:
Here's a close up of the quilting in progress. The middle seam hasn't been done yet - it will be the same pattern, but with green thread.
I finally finished the quilting today. I need to cut the binding and sew it on. Not sure when I'll get it done, but I'm excited it's almost there.
I'll try to post another time how I made the design - I think it's pretty easy.