Как сделать подобный эффект, но при перетаскивании scroll_mc

Код:
import flash.filters.GradientGlowFilter;
import mx.transitions.*;
import mx.transitions.easing.*;
//
var art:MovieClip = createRectangle(9, 100, 0x666666, "scroll_mc");
function createRectangle(w:Number, h:Number, bgColor:Number, name:String):MovieClip {
var mc:MovieClip = this.createEmptyMovieClip(name, this.getNextHighestDepth());
mc.beginFill(bgColor);
mc.lineTo(w, 0);
mc.lineTo(w, h);
mc.lineTo(0, h);
mc.lineTo(0, 0);
mc._x = 20;
mc._y = 20;
return mc;
}
//
var distance:Number = 30;
var angleInDegrees:Number = 270;
var colors:Array = [0xFFFFFF, 0x999999];
var alphas:Array = [1, 1];
var ratios:Array = [0, 255];
var blurX:Number = 0;
var blurY:Number = 30;
var strength:Number = 1;
var quality:Number = 3;
var type:String = "outer";
var knockout:Boolean = false;
var filter:GradientGlowFilter = new GradientGlowFilter(distance,
angleInDegrees,
colors,
alphas,
ratios,
blurX,
blurY,
strength,
quality,
type,
knockout);
var filterArray:Array = new Array();
filterArray.push(filter);
scroll_mc.filters = filterArray;
onEnterFrame = function () {
var motion = -1*(this.scroll_mc._y-_root._ymouse+50);
if (motion > 30) {
motion = 30;
}
if (motion < -30) {
motion = -30;
}
filter.distance = motion*0.2;
filter.blurY = Math.abs(motion);
scroll_mc.filters = filterArray;
tween1 = new Tween(_root.scroll_mc,
"_y", Regular.easeOut,
this.scroll_mc._y,
_root._ymouse-50,
1.5, true);
trace(motion);
}