import mx.transitions.Tween;
import mx.transitions.easing.*;

var TW_X:Tween = new Tween(_root.mioClip, "_x", Back.easeIn, 0, 200, 10, true);

in 10 sec il tuo clip si sposta dalla _x 0 alla _x 200

var TW_A:Tween = new Tween(_root.mioClip, "_alpha", Back.easeIn, 0, 10, 5, true);

in 5 sec passa da 0 a 100 _alpha