AS3: Tween from one MovieClip to Another

Question

Hi!
As the title implies, I'm trying to use ActionScript 3 to tween from one movieclip to another based on an external event.
I'm currently using two "Tween" objects to adjust alpha values. The first tweens-out the previous movieclip, and the second tweens-in the current movieclip. Code follows, with headers included for completeness:
// headers
     import fl.transitions.Tween;
     import fl.transitions.easing.*;
// tweens
     var MOVIECLIP1_out:Tween = new Tween(MOVIECLIP1, "alpha", Regular.easeOut, 1, 0, 3, true);
          var MOVIECLIP2_in:Tween = new Tween(MOVIECLIP2, "alpha", Regular.easeIn, 0, 1, 3, true);
My issue, as you might suspect, is that the transition doesn't look right. The previous clip tweens to a blank white screen, and then the second is brought in. I need the tweens to overlap, as they would with a timeline-based tween.
How do I remedy this? My solution was to create a loop, from 0 to 1 incrementing by 0.2, and setting the respective alpha values to increase and decrease. I also planned to set the time for each tween to one-tenth (0.1) of a second:
    var _out1: 1
    var _out2: 0.8
    var _in1: 0
    var _in2: 0.2
while (_in1 <= 1)
    var MOVIECLIP1_out:Tween = new Tween(MOVIECLIP1, "alpha", Regular.easeout, _out1, _out2, 0.1, true);
    var MOVIECLIP2_in:Tween = new Tween(MOVIECLIP2, "alpha", Regular.easeIn, _in1, _in2, 0.1, true);
    _out1 = _out1 - 0.2;
    _out2 = _out2 - 0.2;
    _in1 = _in1 + 0.2;
    _in2 = _in2 + 0.2;
This would result in ten total tweens, over one full second, as follows:
time : Clip : alpha change
0.1 : MOVIECLIP1 : 1 to 0.8
0.1 : MOVIECLIP2 : 0 to 0.2
0.1 : MOVIECLIP1 : 0.8 to 0.6
0.1 : MOVIECLIP2 : 0.2 to 0.4
0.1 : MOVIECLIP1 : 0.6 to 0.4
0.1 : MOVIECLIP2 : 0.4 to 0.6
0.1 : MOVIECLIP1 : 0.4 to 0.2
0.1 : MOVIECLIP2 : 0.6 to 0.8
0.1 : MOVIECLIP1 : 0.2 to 0
0.1 : MOVIECLIP2 : 0.8 to 1
And the transition is complete.
I feel that there must be a smarter way to accomplish this task. Do I have my head screwed on right here? Any suggestions?

Answer 1

I think that I posted this in the wrong forum... maybe an admin can move this to the AS3 section?
Anyway, in the absence of an answer, I coded the following, and it works pretty well. I had to round the alpha values to the tenths place.
YOURBUTTON.addEventListener
  MouseEvent.MOUSE_OVER,
  function(evt:MouseEvent):void
    var _out1:Number = 1;
    var _out2:Number = 0.8;
    var _in1:Number = 0;
    var _in2:Number = 0.2;
while (_in2 <= 1)
    var MOVIECLIP1_out:Tween = new Tween(MOVIECLIP1, "alpha", Regular.easeOut, _out1, _out2, 1, true);
    var MOVIECLIP2_in:Tween = new Tween(MOVIECLIP2, "alpha", Regular.easeIn, _in1, _in2, 1, true);
    _out1 = int((_out1 - 0.2 + 0.05)*10)/10;
    _out2 = int((_out2 - 0.2 + 0.05)*10)/10;
    _in1 = int((_in1 + 0.2 + 0.05)*10)/10;
    _in2 = int((_in2 + 0.2 + 0.05)*10)/10;