Help pwease.

//Set timer so trail will be draw at every frame
var timer:Timer = new Timer(10,400000);
timer.addEventListener (TimerEvent.TIMER, createTrail);
timer.start ();

/*PrevTopX - x of the top marker on previous frame
  PrevTopY - y of the top marker on previous frame
  PrevBottomX - x of the bottom marker on previous frame
  PrevBottomY - y of the bottom marker on previous frame
*/

var PrevTopX:Number=topmarker.x;
var PrevTopY:Number=topmarker.y;
var PrevBottomX:Number=bottommarker.x;
var PrevBottomY:Number=bottommarker.y;

function createTrail (e:Event):void {
   var trail:MovieClip = new MovieClip ();
   //You can change your color here
   trail.graphics.beginFill (0x0033CC);
   
   //Basically, I draw a 4-end polygon connect the 4 markers
   
   trail.graphics.moveTo (topmarker.x, topmarker.y);
   trail.graphics.lineTo (PrevTopX, PrevTopY);
   trail.graphics.lineTo (PrevBottomX, PrevBottomY);
   trail.graphics.lineTo (bottommarker.x, bottommarker.y);
   trail.graphics.lineTo (topmarker.x, topmarker.y);
   trail.graphics.endFill ();
   trail.addEventListener (Event.ENTER_FRAME, animateTrail);
   addChildAt (trail, 0);
//If you use addChild here, the trail will be created on top of the blade
//Since you don't want that, addChildAt will add new clip on level 0 which is the bottom

   PrevTopX=topmarker.x;
   PrevTopY=topmarker.y;
   PrevBottomX=bottommarker.x;
   PrevBottomY=bottommarker.y;
}

function animateTrail (e:Event):void {
//Reduce the alpha of the trail in each frame by 20%
//Reduce this number for longer trail.
   e.target.alpha -= 0.20;
   
//Remove the trail when alpha is smaller than 0
   if (e.target.alpha < 0) {
      e.target.removeEventListener (Event.ENTER_FRAME,animateTrail);
      removeChild ((MovieClip)(e.target));
   }   
}

function onEnterFrame()
{
    sword.onEnterFrameFunc();
}
sword.alpha = 50;
sword.rgb = 25000;
sword.lineMC._visible = false;
sword.queueLen = 5;

function getPosNow()
{
    var _loc2 = {x: 0, y: 0};
    var _loc1 = {x: 0, y: 0};
    localToGlobal(_loc2);
    lineMC.localToGlobal(_loc1);
    return ({p1: _loc2, p2: _loc1});
}
if (rgb == null)
{
    rgb = 16777215;
}
if (alpha == null)
{
    alpha = 100;
}
createEmptyMovieClip("shadowMC", 0);
if (shadowMC.shaQueue == null)
{
    shadowMC.shaQueue = new Array();
    shadowMC.queueLen = Math.abs(int(queueLen));
    if (shadowMC.queueLen == 0)
    {
        shadowMC.queueLen = 10;
    }
    var p = getPosNow();
    var i = 0;
    while (i < shadowMC.queueLen)
    {
        shadowMC.shaQueue.push(p);
        ++i;
    }
}
onEnterFrameFunc = function ()
{
    shadowMC.pushPos();
    shadowMC.render();
};
shadowMC.pushPos = function ()
{
    this.shaQueue.shift();
    this.shaQueue.push(getPosNow());
};
shadowMC.render = function ()
{
    this.clear();
    var _loc10 = alpha;
    var _loc13 = _loc10 / this.queueLen;
    var _loc3 = [];
    for (var _loc2 in this.shaQueue)
    {
        var _loc5 = this.shaQueue[_loc2].p1;
        var _loc8 = this.shaQueue[_loc2].p2;
        var _loc6 = {x: _loc5.x, y: _loc5.y};
        var _loc9 = {x: _loc8.x, y: _loc8.y};
        this.globalToLocal(_loc6);
        this.globalToLocal(_loc9);
        _loc3[_loc2] = {p1: _loc6, p2: _loc9};
    }
    for (var _loc2 = _loc3.length - 1; _loc2 > 0; --_loc2)
    {
        _loc5 = _loc3[_loc2].p1;
        _loc8 = _loc3[_loc2].p2;
        var _loc4 = _loc3[_loc2 - 1].p2;
        var _loc7 = _loc3[_loc2 - 1].p1;
        this.beginFill(rgb, _loc10);
        this.moveTo(_loc5.x, _loc5.y);
        this.lineTo(_loc8.x, _loc8.y);
        this.lineTo(_loc4.x, _loc4.y);
        this.endFill();
        this.beginFill(rgb, _loc10);
        this.moveTo(_loc4.x, _loc4.y);
        this.lineTo(_loc7.x, _loc7.y);
        this.lineTo(_loc5.x, _loc5.y);
        this.endFill();
        _loc10 = _loc10 - _loc13;
    }
};