I've seen a few examples were text automatically scrolls to the left when scrolling down the page, and then reverses direction when scrolling up the page. I spotted this example in one of your posts to give you a visual representation.
See the Pen qLxwPy by mikeK (@mikeK) on CodePen
Ah, so you don't really want it totally linked to the scrollbar. Sure, you can just alter the timeScale of the animation(s) with a single ScrollTrigger. Here's a simple example (forked demo):
See the Pen rNjvgjo?editors=0010 by GreenSock (@GreenSock) on CodePen
I created that roll() helper function just to make it simple to create a looping animation where it clones the element, puts it right next to it, and makes it look seamless. I animated the