[wingspan]

Really neat! I whipped up a single file HTML version [1] with a demo [2] using only a CDN-hosted QR library. Thanks for the distraction!

[1] https://gist.github.com/ianobermiller/9f17f1022bc75c2228d742...

[2] https://bl.ocks.org/ianobermiller/raw/9f17f1022bc75c2228d742...