private void CreateScrollingKnot()
{
Entity knot = scene.CreateEntity( "knot", "knot.mesh" );
knot.MaterialName = "TextureFX/Knot";
// add entity to the root scene node
SceneNode node = scene.RootSceneNode.CreateChildSceneNode( new Vector3( 200, 50, 150 ), Quaternion.Identity );
node.AttachObject( knot );
}