Job description
I would like to add a 30s countdown timer to selected slides, which would start when a particular slide is opened and count down from 30s to 0 and stop (without any additional actions). There is currently a replacement solution implemented in the form of an embedded youtube video.
https://developers.google.com/apps-script/guides/sheets/functions - you can do it this way or if someone knows another way I am also open to suggestions.
