Draw method stop at first frame

programming flash
1

I need to make an animated flower movie using tile of one bitmap. I use the code below but write only the first frame then stop, how can I draw more frames?

createEmptyMovieClip("triangle",2);
triangle.beginFill(0x000000,100);
triangle.moveTo(width_map/2,height_map/2);
triangle.lineTo(width_map/2+(height_map*Math.tan(angle)/2),0);
triangle.lineTo(width_map/2,0);
triangle.endFill();
triangle._visible = false;

attachMovie(elm_link,"elm",1);

elm.setMask(triangle);

sl_bmp = new flash.display.BitmapData(height_map*Math.tan(angle), height_map/2, true, 0x00000000);
angl = 0;
for (i=1; i<=slices; i++) {
    createEmptyMovieClip('elm'+i,10+i);
    this['elm'+i].createEmptyMovieClip('elm',0);
    this['elm'+i].elm.attachBitmap(sl_bmp,0,"always",true);
    this['elm'+i].elm._x = -height_map*Math.tan(angle)/2;
    this['elm'+i].elm._y = 2-(height_map/2);
    this['elm'+i]._x = width_map/2;
    this['elm'+i]._y = height_map/2;
    if (angl>0) {
        this['elm'+i]._rotation = angl;
    }
    angl += 360/slices;
}
function onEnterFrame() {
    elm._rotation += rotspeed;
    elm._x += transpeed;
    elm._y += transpeed;
    var tmp_bmp = new flash.display.BitmapData(height_map*Math.tan(angle)/2, height_map/2, true, 0x00000000);
    tmp_bmp.draw(elm,new flash.geom.Matrix(1, 0, 0, 1, -(width_map/2), 0),null,"normal",null,true);

    sl_bmp.draw(tmp_bmp,new flash.geom.Matrix(-1, 0, 0, 1, tmp_bmp.width, 0),null,"normal",null,true);
    sl_bmp.draw(tmp_bmp,new flash.geom.Matrix(1, 0, 0, 1, tmp_bmp.width, 0),null,"normal",null,true);

}