How to integrate custom code (HTML, CSS, JS) from for example codepen?

[KBConcepts]

CodePen to Blocs

Hello, I would have the same problem and would like to add something from Codepen: https://codepen.io/KBConcepts/pen/poExdeY in Blocs, May I also ask for instructions, as I cannot find anything about it here. Thank you very much, Rainer