Second Plan

[KruCz]

How can I make an application run in the background?

Let's say I have a SetTimer script, I would like to add a sound when it reaches the 0 seconds mark, but I do not know how to make a background application for the user.

var regressive:Timer = new Timer (10000,0);
regressive.addEventListener(TimerEvent.TIMER, to_Regress);
regressive.start();
function to_Regress (TimerEvent:Timer) {
     regressive.stop();
     // sound
}

Someone could help me? Thanks!

[Ned Murphy]

It is not clear to me what you are after beyond indicating you want to have a sound occur when the timer executes.  I do not see how a background application fits into the situation.  To work with sound, look into using the Sound and SoundChannel classes... https://www.google.com/search?q=as3+sound