The mind must be given relaxation; it will arise better and keener after resting. As rich fields must not be forced-for their productiveness, the have no rest, will quickly exhaust them constantlabor will break the vigor of the mind, but if it is released and relaxed a little while, it will recover its powers
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