{{explanation}}
4s & 5s & 6s start on opp sides

1-8
: All Ladies Adv+Ret, all Men dance round partners RSh & end in centre
  with partners
9-16
: 1s+2s+3s slip step down & back **while** 4s+5s+6s slip step up & back
  (Men pass BtoB)
17-24
: 1s+2s+3s dance modified Allemande & end with 2s dancing to top (2 3 1)
  as 4s+5s+6s dance reverse Allemande down (5s to end). 2 3 1 6 4 5
25-32
: 1s+6s (centre couples) dance RH across & LH back
33-40
: 2s+3s also 4s+5s dance R&L
41-48
: 1s cross up & dance out between 2s & 3s, up round 2s & dance down to
  meet 6s who dance similarly round 5s, 1s+6s 1/2 turn opp dancer 2H
49-56
: Repeat bars 41-48 at opposite ends & end by turning opposite dancer 2H
  to places
57-64
: All set twice & turn RH. 2 3 1 6 4 5

{{explanation}}
Repeat with new end couples