Lewis Carrol was about 123 years ahead!

https://en.wikipedia.org/wiki/The_Mouse%27s_Tale

I know the feeling - a lot of what I remember from the internet 20 years ago simply doesn't exist, and is unfindable on any search engine.

You may be thinking of one of the poems of Christian Morgenstern? He used many tricks of formatting for jokes, famous example that fits with yours is The Funnels

https://www.babelmatrix.org/works/de/Morgenstern%2C_Christia...