To Define Hierarchical Motion

Create the actors with the Create Actor tool.
Using the Attach Actor tool, attach the actors to each other, starting with the lowest in the hierarchy through to the top.
Manipulate and/or move the actors to their required locations.
Note: If an animation includes many actors that move independently of one another, then separate keyframes can be created for each actor. They then can be scripted separately, thus simplifying an otherwise complex task.