Slow moving sparkly circular shape as it moves both outwards and inwards quickly at first and then slowly—looking like a black hole

Background, Cloudy, Abstract, Science, Flash, Space, Cloud, Glitter, Motiongraphics, Glow, Bokeh, Blink, Glint, Shimmer, Shine, Symbolic, Twinkle, Cosmic, Celestial, Layer, Shallowfocus, Extraterrestrial, Outoffocus, Huge, Heavenly, Flashing, Sparkling, Flicker, Vast, Planetary, Astronomical, Billow, Compositing, Curtain, Stellar, Otherworldly, Evolving, Immense, Blackhole, Glisten, Eventhorizon, Highlights, Inthesky, Gleam, Titlesequence, Specularhighlights, Colossal, Enourmous, Nonpictorial