January 28: No libraries, no canvas, only HTML elements.

Here's a patch of the Penrose P3 tiling rendered entirely as pure HTML+CSS. I used code to generate the HTML, but the end result is self-contained. Each tile is a <div>; the trick is (relatively) easy because rhombs are affinely transformed rectangles.

You can see the HTML at https://cs.uwaterloo.ca/~csk/tmp/penrose.html. #genuary #genuary2026