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

1-8
: 1s & 3s set & turn RH, 1s cast to 3rd place & cross LH to face down to
  as 3s lead up crossing & cast into 1st place.  3 2(1)(4)
9-16
: All dance reels of 4 on sides
17-24
: 3s followed by 2s lead down & cast to places as 4s followed by 1s cast
  to top & lead down to places
25-32
: 3s+2s also 1s+4s dance Allepousse:

: 3s & 4s (end couples) dance Allemande **while**

: 2s & 1s (middle couples dance Poussette to end 2 3 (4) (1)