1-8
: 1s lead down, cross & cast up round 3s to 2nd place opp sides (2s step
  up 3-4); 1s turn 1.1/4 RH to end in centre facing 4th corner
  (1M+3M, 1L+2L)
9-16
: 1M+3s & 1L+2s dance RSh reels of 3 across. Bars 15-16: 1s turn 1.1/4 RH
  to face 4th corner again
17-24
: 1s dance reels of 3 on own side (RSh to 4th corner to start).
  Bars 23-24: 1s turn 1.1/4 LH
25-32
: 1M+3s & 1L+2s dance RH across, 1s pass RSH to dance LH across with other
  couple. (1s remain in middle to start 2nd turn)