Ok, wait a minute.

\phi= 1+\frac{1}{1+\frac{1}{1+...}}

This is so cool!!
Ok, so for anyone wondering what is so cool: on Calckey this looks like this: it's rendering the math, and making it bigger, and cycling through a rainbow color animation. Misskey Flavored Markup / MFM, or so I've been told.
And here's a screenshot: