In addition to being phrases to describe a formation (as in
"12 Matrix 3x3 Follow Your Leader" from parallelogram
waves), these are concepts in their own right. They date
from a time when concepts were less rigorously defined than
they are now, and people just had to know how to do various 12 Matrix calls. In
modern terminology, they could be defined as "Piecewise Triple/Quadruple
Formations Working Forward/Together". Once one gets accustomed to them,
12 Matrix calls have a very natural feel, without the intimidating aspects of
Multiple Formations Working <direction>.
The fundamental call is 12 Matrix (or 16 Matrix) Circulate.
It follows the rules completely naturally, with the special
definition that you are a trailer (and hence walk straight ahead) if
there is any spot in front of you. People in the center line
are considered to be trailers.
\sxvBBBstwelve{b4s,g4n,b5s,g5n,b6s,g6n}
\sxvBBBstwelve{b3s,g5n,b4s,g6n,b5s,g1n}
before 12 Matrix Circulate
after
\sxvBBBstwelve{b4s,g4n,b5s,g5n,b6s,g6n}
\sxvBBBstwelve{g4s,g5n,b4s,g6n,b5s,b6n}
before 12 Matrix Split Circulate
after
Calls that normally have N stars will have N+1 stars with 12 Matrix and N+2 with
16 Matrix.
\sxvBBBs{b3s,g3n,.+.,g4n,b4s,.+.}
\syhtridiamonds{.+.,b2w,g3n,b3e,g2s,.+.}
before 12 Matrix Alter and Circulate
Trade, U-Turn Back, Cast 3/4
\syhtridiamonds{g3s,b2w,g4n,.+.,.+.,b3w}
\syhtridiamonds{g4s,.+.,g3n,b2e,.+.,b1w}
\sxvBBBs{b2n,g3s,b3n,.+.,.+.,g2s}
center 4 Trade, ends Circulate
turn diamonds
finished
\sxvBBBs{b3s,.+.,g3s,g2n,.+.,b2n}
\sxvBBBs{.+.,g2n,b3s,b2n,g3s,.+.}
before 12 Matrix Motivate
Circulate
\syhtwmstar{g1e,.+.,g2e,.+.,b4w,b1n}
\syhtwmstar{.+.,g1w,b4e,b1s,g2w,.+.}
\sxvBBBs{.+.,g1n,b1s,g2n,.+.,b2n}
Cast 3/4, 1/2 Circulate
turn stars, ends trade
finished
Here's a tricky application. Drift Apart, from lines, is defined as
trailing centers Circulate and then Cross Over Circulate, while the
lead centers Cross Over Circulate and then Circulate. The ends do two
Split Circulates. Those all turn into various kinds of 12 Matrix
Circulates.