abstract, and vice versa, art, background, ball, balls, balls newtons, belt, black, black background, blue, book, bow, branch, bulbs, christmas, christmas tree, christmas tree balls, circle, clouds, conversion, decoration, demonstration, different, energy, fire, flowers, fractal, fractals, garland, glow, gnome, gold, highlight, holidays, kinetic, light, lights, line, magic, mechanical system, new year, pattern, pendulum, people, planet, potential, red, scenery, snowflakes, space, sparks, species, sphere, star, toys, tree, wallpaper., window