{{explanation}}
3s & 4s start on opp sides

1-8
: 1s+2s also 3s+4s dance RH across; 1s & 4s cast in 1 place (2s & 3s step
  down/up), 1M+4L also 1L+4M 3/4 turn LH into prom hold
9-16
: 1L+4M dance LSh reel of 3 across with 2s (LSh to 2M) **while** 1M+4L
  dance LSh reel of 3 across with 3s (LSh to 3M)
17-24
: 1L+4M dance LSh reel of 3 on Ladies' side (LSh to 3M) **while** 1M & 4L
  dance LSh reel of 3 on Men's side (LSh to 2M)
25-32
: 1s+4s dance RH across & dance 1/2 R&L. 2 4 (1) (3)