1-8
: 1s+2s dance RH across 1/2 way & 1s followed by 2s lead down the middle
9-16
: 1s+2s dance LH across 1/2 way & 1s followed by 2s dance back to original
  places remaining in middle ready for ...
17-24
: 1s+2s dance Poussette. 2 1