A Roman mosaic floor with birds and a kantharos, a vessel with two handles, in the centre of a circle of alternating triangles in red, blue, white and ochre, creating an optical illusion of continuous motion, a kind of swirl.
https://social.anoxinon.de/system/media_attachments/files/109/500/708/670/929/836/original/220912ec99c4944c.jpg