nonlinear programming?

[jeremiahrogers at my-deja.com]

is there a way for me to start on a function, then
move onto another function before that function
ends? I am working on an mpg123 frontend, and i
want to start a song playing, then allow the user
to either skip that song, or perform other
essential tasks during the time when a song is
playing. is this possible?


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