Background Actions together with User Actions?

[LiquidNitrogen]

Im not new to AU3 just havent Posted here alot. But something ive been wondering is would it be possible (I should probabaly be asking how) to have like maybe clouds moving behind in the background of an AU3 game while the user is playing it without interrupting anything? Or something of that sort. Not just talking about animations.

Maybe having an AI (Computer) Enemy attacking you while you attack it would be another Example or while you are idle. Like in many Games. Any help or examples would be good.