I've noticed a lot of questions around the Internet regarding sleep() functions in Flash. Well, there isn't exactly a direct command to pause a Flash movie, instead we have to rely on the same type of functions available in JavaScript, setTimeout or setInterval. Alright, here it is
// Call the function, time in seconds
sleep(5);
function sleep(sec) {
// Stops the script on the current frame
stop();
// The actual pause, and starter
setTimeout(this.gotoAndPlay, sec*1000, this.currentFrame + 1);
}
I usually place the function inside a class, or in a bottom layer that's always included. That way I can just call the sleep() whenever I want. 