function demo () {
    var smallStar = vectors.star(5, 0.38, 0.5 * Math.PI).scale(50),
        largeStar = smallStar.scale(5);

    smallStar
        .animate({
                translation: largeStar.translate(Vector(300, 300)),
                duration: 2000 })
            .interpolate(50)
            .animate({
                    scale: [1, 5],
                    rotation: [0, 2 * Math.PI],
                    duration: 3000 })
                .interpolate(100);
}