Sorry, after I posted I realize that I was misunderstanding what you were wanting. I thought you were wanting a different randomly start value each time it does a full rotation     To get easing I'd set it up differently. You can actually use a tweens ease if you do this approach. Here I animate to the given frame and then start a linear infinitely rotating animation: See the Pen MWKrJeQ?editors=0010 by GreenSock (@GreenSock) on CodePen