Help with music-function generating music

[Urs Liska]

Hi all,

I'm completely at a loss and need to get some help and pushes in the 
right direction.

I'm for the first time trying to write a music function that actually 
gerenates music events on its own, i.e. that doesn't use #{ #} to output 
music.
The sections in the "Scheme tutorial" in the Extending Manual don't 
really help me, and trying to understand 
http://lsr.di.unimi.it/LSR/Snippet?id=566 which seems to be quite 
related to what I want is equally over my head.
Therefore I'd be happy if someone could give me a (commented?) example 
of at least the first steps of what I try. From there I'd be able to go 
forward or ask more concrete questions.

The initial thing my function should do is:
- take a pitch and a number
- repeat that pitch for the given number of times
- beam the whole group
- make that in a loop that allows me
  to apply a new override for each note

I think that should be very basic, and it's actually quite far from what 
I want to achieve, but it should be a good starting point for 
understanding how it works.

Thanks in advance
Urs