Flash in IMVU is an overlay that sits 'on top' of the view, it can't be 'embedded' in the scene in the same way as normal UV assigned bitmaps so it's not possible to do what you're thinking of doing. It can be used to trigger actions and animations based on various types of input (typically user) however, the kind of incremental properties attributed to a clock would need some serious programming and even then you're relying on IMVU's flash compatibility always working and/or being consistent (which it's not).
