I've been fighting with images on the teaching page of this site (mostly related to sizing and having things look nice yet be responsive), so I decided to replace them with svg patterns generated at Doodad.dev. Since the Apollo theme used for this site allows me to call any URL as an image on a page with "cards," I was able to replace the images I had been hosting with the URI generated by the "CSS background image" selection on the pattern generator. I don't totally understand the magic of svg, but that's okay.
The pattern generator itself is fun to play with, and I've been amazed by how a small change to the components can create an entirely new pattern.
For example, dots in circles become flowers, just by increasing the size of each dot.