Thanks for the easy-to-follow instructions. I could quickly come up with an updated, less-likely-to-bore version ( http://bl.ocks.org/mdengler/a36fac5f10098bb9

Thanks for the easy-to-follow instructions. I could quickly come up with an updated, less-likely-to-bore version ( http://bl.ocks.org/mdengler/a36fac5f10098bb94846 http://bl.ocks.org/mdengler/a36fac5f10098bb94846 ), and included a version of your instructions and link to your comment.