1-8
: 1s+2s+3s dance Grand Chain (1s cross, 2s+3s change places on side)
9-16
: 1s followed by 2s+3s cast, dance down behind own lines & dance up under
  arch made by 4s to place
17-24
: 1s cross & cast (2s step up); 1s cross & cast to 4th place (3s+4s step
  up)
25-32
: All circle 8H round & back