Nothing, to my way of thinking, is a better proof of a well ordered mind than a man's ability to stop just where he is and pass some time in his own company.
Seneca

@scroll-timeline

The @scroll-timeline CSS at-rule defines an AnimationTimeline whose time values are determined by scrolling progress within a scroll container and not by minutes or seconds. Once specified, a scroll timeline is associated with a CSS Animation by using the animation-timeline property.
@scroll-timeline css reference