1-8
: 1s 1/2 turns 2s on sides into double triangle position & dance 6 bars of
  Double Triangles end facing 1st corners
9-16
: 1s dance Pass+Turn with 1st corners & pass RSh to face 2nd corners,
  dance Pass+Turn with 2nd corners with 1s fending in 2nd place opp side
17-24
: 1s set, cross RH, cast to top & dance down to 2nd place in centre
25-32
: 1s dance reels of 3 on own side (1s in & down to start)