{{explanation}}
1s start on opp sides

1-8
: 1s+2s dance R&L (RH on sides to start)
9-16
: 1s+2s set to partners twice & turn 2H
17-24
: 1s+2s dance RH across & LH back to places
25-32
: 1s+2s set twice facing up/down dance, 1s turn opposite dancer 2H 1.1/2
  times to end 2nd place opposite sides

{{explanation}}
Note -  on bar 64 new top couple crosses to opposite sides as original 1s at bottom cross to own sides.