{{explanation}}
6 couple square set, 5s & 6s in centre, 5s facing 1s, 6s facing 3s

1-8
: 1s+5s+6s+3s dance RSh reels of 4 up/down set
9-12
: 1s+5s also 6s+3s dance RH across **while** 2s & 4s 1/2 turn partner RH &
  set
13-16
: 1s+5s also 6s+3s dance 1/2 LH across **while** 2s & 4s 1/2 turn partner
  LH, 1s & 3s (centre couples) chase clockwise 1/2 round in
  centre **while** others chase anticlockwise 1 place
17-24
: 6s+3s+1s+5s dance LSh parallel reels of 4 across set
25-32
: 3s+1s (centre couples) join NH with corners & set as Double Triangles
  moving 1 place clockwise & repeat (outer couples may join NH). End 2 6
  4 5 1s In centre facing up, 3s in centre facing down