If you just want to do this occasionally, like when you go to a new chapter, then you could have the last passage of the chapter go to a passage that has the animation. Then just put a <<goto>> macro within a <<timed>> macro in the passage with the animation, so that it will automatically go the the first part of the next chapter after the time you set in the <<timed>> macro runs out.
I generally wouldn't recommend doing transitions between every passage though, since it will slow things down and quickly become tedious for the reader unless you have a LOT of different entertaining animations.