modular "markup" and arguments

[Bric]

Hi, all

I was pleasantly astounded that lilypond allows for things like

boo = { \once { \override NoteHead.color = #red  } }


and then "mark up" notes sporadically, with  \boo cis' .... .... \boo d

But here's what I want (give me an inch, I'll want a lightyear!)

I want the ability to distribute the effect of "\boo" to a SET of notes.

Such as \boo {  dis'  e'  fis' g' }

where all the four notes are affected by boo.

I tried using

boo = { \override NoteHead.color = #red }

and  then  \boo dis' e' fis' g \revert

but that, of course, is incorrect syntax.

So what gives?   Such a wonderful thing as a "modular markup"  and yet 
it's a hair away from being hyperglorious only because you cannot 
parametrize it, or make it distributive to a set.

By the way, can someone please tell me what the above is called, in 
lilypond jargon.

I also realize that in lilypond, the term "markup" is reserved for text, 
and I think that's unfortunate, because it's a broader concept, that 
would include the phenomenon I am refferring to here.

It would be amazingly cool if you could feed parameters into \boo

This would then be an awesome hybrid of markup+algorithmic syntax

(am I off my rocker!??)