Animated Parallax Banner

I would like a parallax banner slider that animates as you scroll similar to https://www.gatlinburg.com but not as complicated. I have PSD files with different text and image layers for each "slide". The animation plays like slides, each slide as you scroll. When first loaded, it animates for a few seconds and then pauses until the user begins to scroll. The page doesn't scroll down while scrolling but there's a Skip Intro button that will move the user to the content under the banner. I have a short video using the text and images that demonstrates the animation I am looking for .

I am looking for HTML, CSS and JS which I will integrate into my WordPress site.

Please do not bid on this project if you are not experienced with this type of work. If the final product is not acceptable, you won't be paid.