How to animate 1 slide of a slider?

Question

css

Hello!
There is an owl-carousel codepen slider code with css content animation

When switching, the animation on all slides works
but I can’t figure out how to make the animation for 1 slide
Initially, the first slide without animation
I will be glad for any help

Answer 1

Like this:
https://codepen.io/Goszowski/pen/YeXQPX