How to customize slides (add more)?

Question

css

I found a beautiful slider https://codepen.io/mrspok407/pen/NRxBWa but I can't figure out the code. Added one radioButton, switches everything, but starts up in a circle between these two default slides. I tried to duplicate the code in CSS, I substituted values ​​from JS for it, but nothing happens, at most the text is simply superimposed on top on the second slide. That beats me ...

Answer 1

I think your answer to the question can be found here - https://habr.com/en/post/324034/