actionscript 3 - How to rescale a element in a scaled container -

im trying scale pattern element before use same element in _mesh.graphics.beginbitmapfill(_box, matrix, true, true);, doesnt consider , doesnt scale pattern element> background. pattern element used filling background name of "box"

this code in class have far creating of effect want

                private var _mesh:shape = new shape();                 private var _box:bitmapdata = new box();                  public function createrow_col() {                           addeventlistener(event.added_to_stage, zzz);                 }                   private function zzz(e:event):void {                           removeeventlistener(event.added_to_stage, zzz);                           var stagew:number = stage.stagewidth                           var stageh:number = stage.stageheight                           var elementw = _box.width                           var elementh = _box.height                           var numberelements_w = math.ceil(stagew / elementw)                           var numberelements_h = math.ceil(stageh / elementh)                           var scalex:number = 1                           var scaley:number = 51                           var background_w = numberelements_w * elementw * scalex                           var background_h = numberelements_h * elementh * scaley                           //trace(background_w + " = "+ numberelements_w + " * " + elementw)                           var  matrix:matrix = new matrix()                           matrix.scale(scalex,scaley);                           _mesh.graphics.beginbitmapfill(_box, matrix, true, true);                           _mesh.graphics.drawrect(0, 0, background_w, background_h);                           _mesh.graphics.endfill();                           _mesh.x = _mesh.y = 0;                           _mesh.scalex = stagew / background_w;                           _mesh.scaley = stageh / background_h;                           trace(stageh / background_h)                           addchild(_mesh);                 }         } 

}

what mean > when comment /*_mesh.scalex = stagew / background_w; _mesh.scaley = stageh / background_h;*/ have 2 rows must ,cause ill have different scalex , y change depending on events(the element bigger or smaller)

but when uncomment _mesh.scalex , y dont 2 rows fit in entire scree want , 5 rows (they purfectly sized fit stage.stagewidth or height - want not allways five).and worse when change scaley or x of pattern element number .5 or 51 or 501 doesnt care >> 5 rows.

can fixed ?

the stage has 550x400 dimensions , element has 63x83 dimensions

edit: needs when var scaley:number = 3 this

when var scaley:number = 2

var stagew : number = stage.stagewidth; var stageh : number = stage.stageheight;  var container : sprite = new sprite();  var tilen : number = 3; var tilem : number = 7;  var tilew : number = stagew / tilem; var tileh : number = stageh / tilen; (var i:int = 0; < tilen; i++)  {     (var j:int = 0; j < tilem; j++)      {         var tile : sprite = new sprite();         tile.graphics.linestyle( 1, 0xff0000 );         tile.graphics.beginfill( 0x0000ff, 1 );         tile.graphics.drawrect( 0, 0, tilew, tileh );         tile.graphics.endfill();         tile.x = j * tilew;         tile.y = * tileh;          container.addchild( tile );     }                } container.width = stagew; container.height = stageh;  addchild( container );