This twin spiral takes shape, of course, from the world-famous Fibonacci sequence…
I made a bunch of mistakes while drawing & coloring this, but thanks to the simple generative formula (and perhaps our predisposition to see the mathematical perfection behind imperfect nature), the shape still comes together.
Here are the generative squares for the initial numbers {0,1,1,2,3,5,8…}:
The spiral proceeds through each square on its way out from the center:
www.MarekBennett.com 
That would make a nice looking quilt.
I’ll stick to the design work, & let you do the stitching! 8*}
Love this Marek, combines the imagination of children with cosmic geometrics. Can I use it on my facebook page? Thanks Richard
Thanks! Sure!