How to force thumbnails to be fixed?

Question

Slick

Good afternoon, I found a slick slider solution how to make it with thumbnails
https://codepen.io/clever/pen/ZPJXZG
It turns out that when I switch dots on the main slider, the thumbnails seem to go off the screen. In general, is it really possible to make them fixed on a slick? The fact is that I do not need them to scroll, they should always be in the same place, without the infinite parameter