Square Thru until the original Centers become Ends of Back-To-Back Lines and
until the original Outsides become Centers of Facing Lines; New Centers
(working in the middle) do the anything call or complete the
Square Thru n (continuing with alternating hands). EN: 20
Several callers, myself included, call this as Mixed Up Square
Thru, Centers go n More to clearly indicate the number of
additional hands for the new Centers. EN: 50