[dreadlordbone]

Javascript version here: https://jsfiddle.net/buk3dsqv/

[entropie]

It would be nice if you consider to put it in a jsfiddle, or something.

[dreadlordbone]

Good point, updated that to a jsfiddle.

[stevekrouse]

I ported your jsfiddle to run on val town!

Main function: https://www.val.town/v/stevekrouse.sparklineSVG

Rendered example: https://www.val.town/v/stevekrouse.sparklineEx2

[entropie]

Thank you ♥