1-8
: 1M+3L change places by dancing 3/4 Figs of 8 on own sides (casting
  behind 2s to start) & cross to opposite sides
9-16
: 1L+3M change places similarly
17-24
: 2s dance Diag R&L ending with 1s facing to 2s
25-32
: 1s+2s set, change places with 1s making an arch, 1s+3s set & change
  places with 3s making an arch