An animated ring of 360 triangle-shaped objects.
The animation is applied on a colormatrix filter.
Three different ones, to be precise.
With 7, 9 and 36 s time intervals, so that the animation creates a complete loop in 252 seconds.
Still image available here:
https://www.deviantart.com/lazururh/art/triangle-ring-1196325137
More info:
https://inkscape.org/forums/wip/knots-loops-impossible-objects/#c80095
Another version is available here:
https://openclipart.org/download/351605/s-18.svg