{{explanation}}
3s & 4s start on opp sides

1-8
: 1s+2s also 3s+4s set & dance 3/4 "Lefts & Rights"
9-16
: 1s+4s dance 1/2 RH across, retain RH with partner, dance out of ends of
  set, cross & cast to face nearest corner on diagonals (4L+2M, 4M+2L,
  1L+3M, 1M+3L)
17-24
: 4s & 1s dance double "Hello-Goodbye" setting, finishing in centre facing
  diagonally opposite corner
25-32
: 1s & 4s turn corners (1L+2M & 4L+3M LH, 1M+2L & 4M+3L RH) dancing out of
  ends of set to finish on sides. 1s+4s Set+Link 2 4 (1) (3)