1-8
: 1s set advancing, dance down between 2s, behind 3s & lead up to face 1st
  corners
9-16
: 1s change places RH with corners, corners pass LH in centre, change
  places RH with 1s & 1s turn LH to face 2nd corners
17-24
: Repeat above Fig with 2nd corners with 1s ending 2nd place opposite
  sides
25-32
: 3s+1s+2s circle 6H round to right 1/2 way & all turn RH