I am trying to prepare a lecture on scales.

The usual equal tempered scale would be
a
ar^2
ar^4
ar^5
ar^7
ar^9
ar^11
ar^12 = 2a

where a is say 440 Hz and r is 12th root of 2

What if we change r to 7th root of 2
and replace the powers 2 4 5 7 9 11 12 by 1 2 3 4 5 6 7?

I want to show these kind of experiments on the computer and believe csound is a good place to try.

Are there any toots/templates etc for such?
Also which opcodes should I concentrate on?

If this can be done conveniently then there are others I would like to try, eg. demonstrate the pythogorean and syntonic commas.