multiple volta spanners...

[address@hidden]

Hello,

I'm trying to create a lilypond file that will output this:
http://www.davidoakesguitar.com/pdf/Etude_1.pdf

But I just don't get it!

I have this .ly file which contains part of the score, but I struggle 
with the repeats and the changing of \time

%--- Beginning of ly file
\version "2.15.95"

\header {
  title = "Jazz Etude One"
  composer = "Jimmy Wyble"
}


global = {
  \time 3/4
  \key f \major
  \tempo 4=144
  \set Timing.beamExceptions = #'()
}

upperOne = {
  \global
  c8 gis e c r4
}

upperTwo = {
  \set Timing.beamExceptions = #'()
  a'2 a4
  \numericTimeSignature \time 4/4
  \set Timing.beamExceptions = #'()
  bes2 b4. d8
  \time 3/4
  \set Timing.beamExceptions = #'()
  c2 ees4
  d4. c8 (c4)
  b2 r4
  bes8 c des ees
}


upperAltA =
{
  \time 5/4
  \set Timing.beamExceptions = #'()
  e4 b c' bes,! aes'
}


upperAltB = {
  \time 3/4
  \set Timing.beamExceptions = #'()
  <c, e>4 <c f>4 bes'4
}

upperThree = {
  b4 c, des
  fis2.
  bes,8 c des bes ees4
  e2.
}

lowerOne = {
  \global
  e,8 c ges c bes ges
}


lowerTwo = {
  \set Timing.beamExceptions = #'()
  f b c d e c
  \numericTimeSignature \time 4/4
  \set Timing.beamExceptions = #'()
  d f, g gis f' d gis, d''
  \time 3/4
  \set Timing.beamExceptions = #'()
  a,8 e' ees g c g
  fis ees d fis d aes
  g des' ees f g a
  c, fis bes f e c
}


lowerAltA =
{
  \time 5/4
  \set Timing.beamExceptions = #'()
  f8 a, bes! ges' f des g, f' e c
}

lowerAltB =
{
  \time 3/4
  \set Timing.beamExceptions = #'()
  f8 a, aes ges' (ges4)
}

lowerThree = {
  g,8 d' des f bes c, (c2.)
  g8 fis' f4 e!8 c
  f,2.
}


<<
  {
    % Voice "1"
    \relative c'' {
      \upperOne
      \repeat volta 2 \upperTwo
      \alternative {  \upperAltA \upperAltB }
      \upperThree
    }
  }

  \\ {
    % Voice "2"
    \relative c'' {
      \lowerOne
      \repeat volta 2 \lowerTwo
      \alternative { \lowerAltA \lowerAltB }
      \lowerThree
    }
  }
>>


%--- End of ly file

// Anders
--
English isn't my first language.
So any error or strangeness is due to the translation.
Please correct my English so that I may become better.