This charming hand-drawn animated gif spins rainbows of color, like a retro pinwheel. It’s more complex than meets the eye, though — its dynamic lightning designs rotate one way, then appear to reverse. Its jerky motion recalls the experience of gazing into a nineteenth-century zoetrope: one moment you can tell it’s sourced from spinning paper, the next you’re taken inside the illusion. It’s equally mesmerizing to stare into the charcoal-gray center. Is it still, or also in motion?