public ParallaxPage()
{
InitializeComponent();
_parallax = new Parallax();
_parallax.AddLayer(Box1, 1, UpdateBox);
_parallax.AddLayer(Box2, 1.25, UpdateBox);
_parallax.AddLayer(Box3, 1.5, UpdateBox);
_parallax.AddLayer(Box4, 1.75, UpdateBox);
_parallax.AddLayer(Box5, 2, UpdateBox);
}