A static icon change would achieve the same thing. You don't need animated icons for that.
To OP of this thread: It was another idle comment. The crux of the request was in boldface.
To OP of this thread: It was another idle comment. The crux of the request was in boldface.
A tighter implementation would be a limited amount over overlay that was configurable -- like the alert # but with more control. The important point being that the underlying icon that I scan for still being available.
MacOS uses this in a number of places to identify download, symlinks and the like.