1-8
: 1s lead down (2 bars), lead up & cast to 4th place into centre & join 2H
  (2s+3s+4s step up 5-6)
9-20
: 1s retire to 4th place (9-10) **while** 2s+3s+4s dance R&L for 3
  couples.  2 3 4 1
21-24
: 2s+3s+4s turn partner RH, 3s face out
25-32
: RSh reels of 3 on sides (3M up/out, 3L out/down).  2 3 4 1