How to make Sidebar mobile menu with animation?

Question

css

In general, I really dream of making such a menu
Who wants to fill messages, don’t write plz, I need just such an animation, it’s not necessary to throw the first one that came across in Google

Tried to order a designer, but he couldn’t do it ...
How do I want in the end?
Just do not judge strictly, I drew in paint, stupidly for an example.

My own question is how to make something like on a gif, I'm talking about animation, where you can copy-paste, or order it, because no matter how many designers I ask, no one can do anything.
Just don't say that this is done only for applications, I want it to be on the web)

Answer 1

https://jsfiddle.net/Lokmwn5a/