private function createConcavePolygon():void
{
    var vertecies:Vector.<Vec2> = new <Vec2>[
        new Vec2(100, 300),
        new Vec2(200, 20),
        new Vec2(250, 30),
        new Vec2(500, 20),
        new Vec2(400, 150),
        new Vec2(600, 350),
        new Vec2(300, 550),
        new Vec2(300, 180)
    ];

    var geomPoly:GeomPoly = new GeomPoly(vertecies);
    var list:GeomPolyList = geomPoly.convexDecomposition(true);
    var listIterator:GeomPolyIterator = list.iterator();
    var body:Body = new Body(BodyType.STATIC, Vec2.get(100, 0));

    while (listIterator.hasNext())
    {
        geomPoly = listIterator.next();
        body.shapes.add(new Polygon(geomPoly));
    }

    body.align();
    body.space = _space;
}