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

1-8
: 1s+2s also 3s+4s Advance into tight circles (Hands Raised) & Retire,
  1s+2s also 3s+4s dance RH across
9-16
: 1s+2s also 3s+4s dance 1/2 R&L, 2s & 3s turn 1.1/2 times, 1M+4L also
  1L+4M turn RH 1.1/2 times on sides into prom hold
17-24
: 1M+4L & 1M+4L in prom hold dance reels of 3 on sides (RSh to 2L/3L)
25-32
: 4s+1s dance LH across & end facing corners, turn corners RH ending on
  sides 2 4(1)(3)
33-40
: All circle 8H round & back