1-8
: 1s cross down & cast behind 3s to meet below 3s, 1s lead up crossing &
  cast up behind 2s to original places
9-16
: 1s+2s+3s turn partners RH & LH
17-24
: 1s+2s set passing partner LSh to dance the Helix:

: Cast right to own sides, 1/2 turn partners RH & dance 1/2 RH across
25-32
: All circle 6H round & back. 2 1 3