With PercentageTimeline you think differently about composing your animations. Instead of thinking with offsets, you think about percentages. When the animation should start and end. Then decided the duration of the timeline. This is a better way of tweeking with the effects. Should the whole thing be faster or slower. Should this start sooner or later. In most cases this is the Timeline you'll want to use. Play with the startAt and endAt of all the animations, then adjust the duration on the percentage timeline to really get a feel for what is happening.