1-8
: 1s lead down middle & back remaining in middle with 2s stepping in
  behind them
9-16
: 1s+2s dance Allemande ending on sides 2 1 3 4
17-20
: 1s cast & chase clockwise to change places as 2s+3s set advg & circle 4H
  round to left 1/2 way & retire to diag opposite place. (3)(1)(2)
21-24
: 1s dance LH across (1L with 3s at top, 1M with 2s)
25-32
: 1s dance RSh reels of 3 on opposite sides (M up, L down) & 1s set advg &
  turn about to face 1st corners (pstn)
33-40
: 1s 1/2 diag reel of 4 with 1st crnrs, set advg & turn about to face 4th
  crnr (pstn), 1s 1/2 diag reel of 4 with crnrs & 1s dance down to
  bottom.  2 3 4 1

: Note  - new top couple starts each time but all couples dance twice