I also used, believe it or no, MATH. Each section was done with Fibonacci Sequencing. The stocking stitch section added by twice and the garter sections added by twice as well. As in 1, 1+1=2, 1+2=3, 2+3=5, etc.
This was made for the DD's wedding. I will likely need the warmth of it, since the wedding is in October, in the UK, on the Channel... I am wearing Citrine Yellow silk with brown accessories, so this is perfect to go with. Erin gave me the yarn in my stocking for Christmas, so I used up stash as well. I am making this shawlette with the remainder of the yarn as it requires slightly under 200 yards and that's about what I have left of the yarn after making the big shawl.