Bitmap splitting

[Terrencing]

Hello peoples, if can help please.


I have image on screen inside of clip, I want split bitmap into squares, at most i can split into columns only, here code

import flash.display.MovieClip;
import flash.display.Sprite;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.geom.Rectangle;
import flash.geom.Point;

var splits:Number = 100;
var splitWidth:Number = Math.round(imageOnScreen.width / splits);
var splitHeight:Number = Math.round(imageOnScreen.height / splits);
var newCopy:BitmapData = new BitmapData(imageOnScreen.width,imageOnScreen.height);
newCopy.draw(imageOnScreen);

for (var i = 0; i < splits; i++)
{
    this["bmd" + i] = new BitmapData(imageOnScreen.width,imageOnScreen.height,true,0);
    this["bmd" + i].copyPixels(newCopy,new Rectangle(i * splitWidth,0,splitWidth,imageOnScreen.height), new Point(0,0));
    this["bm" + i] = new Bitmap(this["bmd" + i]);
    addChild(this["bm"+i]);
    this["bm" + i].x = i * (splitWidth + 1);
}
// make original image hidden to see copy
imageOnScreen.visible = false; 

Any help is advise for me.
If you can help with making copied file transparent pixel, any help great. thank
here file too