@straight-jordan-23612 I didn't have one handy, but I was curious about it myself, so created one just now as an example here: https://gist.github.com/lukehoban/5c168258b641368dcccc7810dc454ca9. I also recorded the live coding of building this up - may be of interest to folks generally to get a feel for the inner-loop process of writing code like this (a couple wrong turns in there - which also may give a sense of some troubleshooting techniques that are useful simple smile).