1-8
: 1M casts 1 place & turns 3L LH, 1L casts 1 place & turns 3M RH, 1s end
  2nd place opposite sides
9-16
: 2s+1s+3s circle 6H round & back (1s end facing 1st corners)
17-24
: 1s set & turn 1st corners, set & turn 2nd corners (1s end between
  corners)
25-32
: 2s+1s+3s Adv+Ret, 1s turn RH 1.1/2 times