Auto backup/save while working

Two things: 1) Backup - when I edit a watch, W1, copy it to an alternate watch before editing, &W1. That way I can revert if I change my mind. If I want to keep both versions, I can rename &W1 to, say, W1a. The next time I edit W1, &W1 will be overwritten. 2) Save - automatically save the watch face currently being edited, W1, periodically to #W1. When I exit and the watch is successfully completely saved , #W1 is deleted. If anything else happens, #W1 has most/all of my edits. I can copy it back to W1 and pick up where I left off. It could save based on time or number of changes, say, every 10 minutes, or every 25 changes. Maybe that can be a user setting.