Here's a very simple arrangement of a theme from my imaginary Broadway musical. (You can click it for a bigger graphic.) If it looks a bit sparse that is because I am entering it one note at a time and I still haven't figured out how to add slurs, crescendos, glissandos or indeed any articulation symbols at all, though I have figured out how to add lyrics.
Strangely I didn't realise it was in compound time until I tried to transcribe it. It is, if I say so myself, a good tune.