I want to have 2 scenes (=timelines)  in my animation. scene1 have some twinkle stars which i want to animate with repeat -1 (infinite). However, i want to set a max time for the scene1 to 5 seconds, so i can move after that to the next timeline/scene. I also want to be able to get the total duration of the animation correctly, based on the max duration of the animation.    I know that I can set the second timeline position to start 5 seconds after the first timeline, but i want to be