{{explanation}}
2s & 4s start on opp sides

1-8
: 1M dances 1/2 Fig of 8 round 2s **while** 4M dances 1/2 Fig of 8
  round 3s, pick up partner (on left) in prom hold dance down/up
  into 1/2 LH across
9-12
: Change places with corner 2s/3s passing RSh, 1s & 4s set **while** 2s+3s
  dance 1/2 LH across
13-16
: 3s & 2s change places with corners 4s/1s, 3s & 2s set **while** 4s+1s
  dance 1/2 LH across
17-20
: 1s dance up between 3s (at top) & cast to 2nd place own
  sides **while** 4s dance down & cast up to 3rd place opposite side.
  (3) 1 (4) 2
21-24
: All 1/2 turn & twirl to other side.  3 (1) 4 (2)
25-32
: All circle 8H round & back