Catriona Shearer spiral

Based on [url=https://twitter.com/Cshearer41/status/1272104391567388672]a tweet[/url] by the brilliant [url=https://twitter.com/Cshearer41]Catriona Shearer[/url].
You can move the two tiny gray dots to change the parameters of this spiral. I did a global logarithmic spiral out of it there might be better ideas...

Information: Catriona Shearer spiral