Saqoosha

package net.saqoosha.thread {

import org.libspark.betweenas3.tweens.ITween;

    import org.libspark.thread.IMonitor;

    import org.libspark.thread.Monitor;

    import org.libspark.thread.Thread;

public class BetweenAS3Thread extends Thread {

private var _tween:ITween;

        private var _monitor:IMonitor;

public function BetweenAS3Thread(target:ITween) {

            _tween = target;

            _monitor = new Monitor();

        }

public function cancel():void {

            interrupt();

        }

override protected function run():void {

            _monitor.wait();

            interrupted(interruptedHandler);

            _tween.onComplete = _monitor.notifyAll;

            _tween.play();

        }

private function interruptedHandler():void {

            if (_tween.isPlaying) {

                _tween.stop();

            }

        }

    }

}

Very simple.