fwibbadle

    package
    {
            import flash.display.MovieClip;
            import flash.events.MouseEvent;
            import flash.events.Event;
            import flash.system.MessageChannel;
            import flash.system.Worker;
            import flash.system.WorkerDomain;

            //[SWF(frameRate=30)]
            public class Main extends MovieClip
            {
                    // worker SWF
                    [Embed(source="BackWorker.swf", mimeType="application/octet-stream")]
                    private var WorkerSWF:Class;

                    // worker object
                    private var worker:Worker;

                    // message channels
                    private var wm:MessageChannel; // worker to main
                    private var mw:MessageChannel; // main to worker

                    public function Main()
                    {
                            // inst worker
                            worker = WorkerDomain.current.createWorker(new WorkerSWF());

                            // worker to main channel setup
                            wm = worker.createMessageChannel(Worker.current);
                            mw = Worker.current.createMessageChannel(worker);

                            worker.setSharedProperty("wtm", wm);
                            worker.setSharedProperty("mtw", mw);

                            wm.addEventListener(Event.CHANNEL_MESSAGE, onWorkerToMain);
                            mw.addEventListener(Event.CHANNEL_MESSAGE, onMainToWorker);

                            // start worker
                            worker.start();

                            // ask worker if it's ready
                            mw.send("AREYAREADY");
                    }

                    protected function onWorkerToMain(e:Event):void
                    {
                            if (e.currentTarget.messageAvailable)
                            {
                                    // get message from worker
                                    var header:String = wm.receive();

                                    if (header == "YEP")
                                    {
                                            trace("Worker is ready. Telling worker to get to work and send back data.");
                                            mw.send("WORK");
                                    }
                                    else if (header == "NUMBER")
                                    {
                                            var num:Number = wm.receive();
                                            // we know this is the data we wanted.. just 500 * 500 + 500 / 500..
                                            trace("Worker result: " + num);
                                    }
                            }
                    }

                    protected function onMainToWorker(e:Event):void {}
            }
    }