From columns: #1 and #2 Split Counter Rotate, while #3 and #4
Circulate into the center and then Reset 1/2 (new #2 roll outward
to meet the new #3, and then they Hinge).
\syhlines{b4e,g4e,b1e,g1e}
\syhlines{g3n,g4s,b4n,b1s}
before Quick Wrap
after
If "magic" is used, the Circulate for #3 and #4 is magic,
and the #1 and #2 do a "Magic Split Counter Rotate" (not a real call) — #1
Split Counter Rotates while #2 Magic Circulates and faces in.