创建Google脚本以在日历事件更新时修改它们

I'd like to create a script that writes down the history of an event, i.e. when I change the date or time of the event and save it, it would copy the previous date/time into the description/note of the event. However, I only found I could write scripts for docs, sheets or forms. Any idea how to do this or did I miss something?I'd like to create a script that writes down th