Dear @Phearhead
There is a bit of a thing about the <marquee> element being depreciated, This Link is asking the same question;
"If not the marquee then what is the best alternative?"
https://stackoverflow.com/questions/31951282/why-is-marquee-deprecated-and-what-is-the-best-alternative
Look into CSS animation marquee instead 🌝
https://codepen.io/jamesbarnett/pen/kQebQO
https://tympanus.net/codrops/2020/03/31/css-only-marquee-effect/
Hope this helps & have a wonderful day 🖼
Richard