1-8
: 1s & 3s dance Figs of 8 round 2s (1s cast to start), 2s step up to top
  place & 1s end in 2nd place BtoB ready for Double Triangles
9-16
: 1s dance Double Triangles **while** corners set & petronella on 1 place
  to right, set & petronella on 1 more place as 1s end facing 3rd corner
  (pstn)
17-24
: 1s dance 1/2 diagonal reel of 4 with 3rd corners, pass RSh & repeat with
  4th corners (pstn)
25-32
: 1L dances a reel of 3 across with 2s as 1M dances reel of 3 across with
  3s both passing 1st corner LSh & 1s end turn RH to 2nd place on own
  side (facing out ready to cast)