Does anyone know of a script that will add a heatmap of past reviews day by day? I mean something like you find on the stats page of Bunpro or like this extension for Anki: 
I’ve found this type of heatmap tool to add another layer of fun motivation to doing daily reviews.
Thanks for any insight or ideas anyone has.
Ohh this is pretty interesting to have for WK as well! I found myself checking it quite often on BP to check how much (or therefor lack of) study I did previously! Would love to know if anyone have/ plan on wring the script for WK 
If anyone wants to implement this, there is example code how to do the heatmap here:
https://hackernoon.com/how-to-recreate-githubs-contribution-graph-a0a8d4d91011
The review data is available with the WK APIv2.
Here ya go