{{explanation}}
Four trios WMW in a square set

1–
: Each trio Reel3, M starts Rsh
9–
: All M set | ½ RHA | dance out between opposite W and cast R to next M place
17–
: 1trio+3trio advance NHJ , the W make a quick BH turn | retire in new trios ; side trios repeat
25–
: Circle 12 and back

{{explanation}}
Progression. Each turn the M move one place cclw, the W cross to opposite side.