{{explanation}}
2 chords  -  on 2nd chord 3s & 4s cross to opposite sides

1-8
: 1s & 4s set, 1L followed by partner cast to dance Fig of 8 on Ladies
  side round 2L+3M & end diagonally facing 2M (partner behind
  her) **while** 4L followed by partner cast to dance Fig of 8 round
  3L+2M & ends diagonally facing 3M (2s & 3s step up/down on bars 7-8)
9-16
: 1s+4s dance 1/2 diagonal Alternating Tandem reel of 4 with 1st corners,
  1s+4s pass LSh (1/2 turning other partner LH) & dance a 1/2
  Alternating Tandem reel of 4 with 2nd corners & end passing LSh (1/2
  turning other partner) & face 1st corners
17-24
: 1s+4s repeat above reels, pass LSh & 1/2 turn other partner to end
  singly on opposite sides (from which they started) order 2 (1) 4 (3)
25-32
: All dance 1/2 reels of 4 on sides, 1s+4s do not pass LSh but turn 2H to
  (3)(1) 4 2, all set & cross RH