This is a nice testimonial or quote block what can be used on your website. It has a card UI layout and was designed by Danil Goncharenko. There are 3 cards in view and they auto-scroll to reveal a new card which stays in the background and is slightly transparent. In the next turn, it turns opaque and is the main active card in view.
If you are having trouble with the pen, try the archived copy on GitHub
Auto Scrolling Card UI Snippet
See the Pen Vertical carousel with TweenMax.js by Danil Goncharenko (@Danil89) on CodePen.0