For each animob, you initially specify:

      * The starting position of this object

      * Its velocity and acceleration (optional).

      * A pointer to the first of its animcomps.

      * A pointer to a special animation routine related to this object
        (optional).

      * Your own extensions to this structure (optional).

 linking the animcomp sequences to the animob 
 position of an animob 
 setting up simple motion control 
 setting up ring motion control 
 using sequenced drawing and motion control