1-8
: 1L casts 1 place, turns 3M RH to end in 2nd place opp side, 1M casts &
  turns 3L RH to end between 3s in line across as 1L goes between 2s
9-16
: 2s+1s+3s set twice with 1s turning onto opposite sides, all set twice
  with 1s turning to face 1st corners
17-24
: 1s turn 1st corners RH, turn partners LH, 2nd corners RH & partners RH
  to 2nd place on own sides
25-32
: 2s+1s+3s set twice & turn RH