Trouble Combining Repeats and Closing Bars in tunes

[Ben Beeson]

Hi,

I am looking at a 4 - part tune where the first and third parts are repeated and the second and fourth parts are not repeated. Try as I may, I cannot get Lilypond to put  the repeats and closing bars in the right place when engraving the tune. The following is just about as simple as I can get it and still show the issue.  

% BarExample.ly 

\version "2.19.48"

example = {   \time 2/4

              \relative c''{

                             \repeat volta 2 { a8 a8 a8 a8 | a8 a8 a8 a8 | \break  }  

                                              \bar ".|" d8 d8 d8 d8 |  d8 d8 d8 d8 | \bar "|." \break

                             \repeat volta 2 { a8 a8 a8 a8 | a8 a8 a8 a8 | \break } 

                                              \bar ".|"  d8 d8 d8 d8 | d8 d8 d8 d8 | \bar "|." \break }

}

 

\score   

{

\new Staff <<

\new Voice {

\example

}

>>   

}

% end BarExample.ly 

This produces the following which is clearly not what I intended since the first and third lines should be repeated and the second and fourth lines are not repeated. 

​

 What am I doing wrong and what is the best way to fix it short of using separate score blocks for each part? 

Thanks in advance for your help,

Ben