Six balls going endlessly inside a glass endless knot -depicted as an impossible object.
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