Hi Simon, Thanks for your answer. I tryied to add a score in my file to have a bebugging compilable file.
I get an error when I compile your code (join file) : Wrong type (expecting Stencil): (#<Stencil > #<Stencil > #<Stencil > # incdiato82.ly <http://lilypond.1069038.n5.nabble.com/file/n203059/incdiato82.ly> <Stencil > #<Stencil > #<Stencil > #<Stencil > #<Stencil >) If I take off the 'apply' from 'apply ly:stencil-add , then the lines you add works but not the make-dot-list function, and if I delete it, the make-dot-list works but not the background... I never learned Scheme at school and this language is not so obvious, and I have a lot of problems to understand it. Even with guile documentation I need to have the basic and actually I didn't found anything which explain from zero. Do you know any good book or tutorial / course ? I try to do my best, Thanks for your help again, ewen -- View this message in context: http://lilypond.1069038.n5.nabble.com/Apply-a-music-function-script-to-all-elements-of-a-list-tp200313p203059.html Sent from the User mailing list archive at Nabble.com. _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user