A pure CSS loading spinner shaped like the Sharingan eye from Naruto: three tomoe rotating around the pupil. No JavaScript and no images.
Live demo: https://fadyehabamer.github.io/Sharingan-Loader/
Open index.html in a browser. To reuse the loader, copy the .sharingan markup from index.html and the rules from style.css. The size is based on 400px (see --tomoe-size).
It announces itself as role="status" / "Loading", scales down on narrow phones and slows down when the OS reduce motion setting is on.