Bunny > pick by UID ... >> scroll to
Give Bunny an instance variable 'TheCenter'. (or boolean)
Set 'TheCenter' to 1 if this Bunny is the center of things, else set it to zero.
Bunny > compare instance variable ( 'TheCenter' = 1) >> scroll to
System > pick by comparisation > Bunny > 'TheCenter' = 1>> scroll to