Hello !  I'm new with scrollTrigger and I don't understand how I can pin elements inside my horizontal scroll section.  For example, in this codepen :  I would like the scroll to stop when the number 3 (grey div)  "touch" the left side of the screen. And then the number 4 scroll above the number 3 section and the classic horizontal scroll continue.  I think it's possible, I hope, but I don't understand how to make it.    I hope my issue is clear, and someone could h