ScrollReveal Horizontal fix

Hello. I have a project that uses [login to view URL] in a horizontally scrolling web page, with parallax. To bid, please understand this library or have a better solution that can be implemented right away. See [login to view URL] As the user scrolls, items (text bubbles) fade in as they enter the right edge of the window, and fade out as they leave the left side of the window. I need to: 1) Start with no bubbles showing until user initiates scroll 2) Bubbles should fade in as they get to the center area of the screen, and fade away a they leave the center area. 3) Should continue to work in modern browsers and window resizing Note that [login to view URL] has a viewOffset parameter that uses pixels. This is not a solution for me because it doesn't flex with the size of the window. If we can create a script that produces a variable that adjusts to window size, we could use percentages in the offset parameter. (So we could effectively say bubbles reveal in the center third of the screen.