{{explanation}}
2 chords  -  2nd chord 3s+4s cross to opp side

1-8
: 1s+4s set, cast down/up 1 place (2s+3s step up/down). 1s+4s in prom hold
  dance out of ends (1s up, 4s down) & cast right. 1s end in 2L's place
  facing down, 4s in 3M's place facing up
9-16
: 4s (prom hold)+2s also 1s (prom hold)+3s dance 1/2 RSh reels of 3
  across; 1s+4s pass RSh to repeat 1/2 RSh reels at other end (1s up, 4s
  down). 1s & 4s finish side-by-side with partner, (Lady on Man's right)
  [Men's side 2 4 (4) (3): Ladies's side 2 1 (1) (3)]
17-24
: 1s+4s set, dance 1/2 RH across; 1M+4M set advancing & change places
  RH **while** 1L+4L Adv+Ret
25-32
: All 4 couples circle 8H round & back. End 2 4 (1) (3)