“If you just sit and observe, you will see how restless your mind is. If you try to calm it, it only makes it worse, but over time it does calm, and when it does, there’s room to hear more subtle things. You see so much more than you could see before. It’s a discipline; you have to practice it.”
Steve Jobs

animation-timing-function

The animation-timing-function CSS property sets how an animation progresses through the duration of each cycle.
animation-timing-function css reference