How to make a loop that changes two different movieclips from visible to invisible every second

Question

I am writing some code that puzzles me. It may be, because I have a cold or because I've never needed to do anything like this. I want to have two movieclips one is visible and one is not. then one second passes the one that was visible is invisible and the invisible one is visible. What would be the best approach to this, besides handcoding if statements. I know there has to be a faster way and less expensive way than handcoding if statements.
I'd like to thank anyone who replies in advance .

Answer 1

this is how i would do it
package
          import flash.display.MovieClip;
          import flash.display.Sprite;
          import flash.events.TimerEvent;
          import flash.utils.Timer;
          public class Main extends Sprite
                    private var mc1:MovieClip;
                    private var mc2:MovieClip;
                    public function Main()
                              // create your mc's here
                              mc1 = new MovieClip();
                              mc2 = new MovieClip();
                              mc2.visible = false;
                              var timer:Timer = new Timer(1000);
                              timer.addEventListener(TimerEvent.TIMER, loop);
                              timer.start();
                    private function loop(e:TimerEvent):void
                              mc1.visible = !mc1.visible;
                              mc2.visible = !mc2.visible;