Changing/Automated icons when a checkmark box is ticked?

I saw a template made by GoogleSheetsPro on Etsy that had a couple of automated tables and charts, but what stood out for me most was the flower growth one. Every checkbox ticked on a to-do/task table had a flower pot icon change into making the flower slowly grow as more boxes were ticked.

How is this done? The charts and tables aren't of any

priority, I'm more interested in how they made it fun with

icons like a little game. I know it's Google Sheets, but I believe this might be possible with excel. I'd like to implement something similar to my personal sheets! Any help is appreciated.