[Axiom-mail] Drawing two curves simultaneously, two different colours?

[Alasdair McAndrew]

When I last asked (about seven years ago!) how to draw two curves (in 2D) on the one set of axes, Bill Page immediately and obligingly provided me with a little gem of a function that you can see at

https://lists.gnu.org/archive/html/axiom-mail/2008-05/msg00038.html

Now I know that it's supposedly possible to colour one's curves: such documentation as I've been able to dig up makes reference to the "spadcolors palette": there's even a domain PAL (Palette), but I can't find how to actually specify a colour; whether RGB (and in which case as a list of three integers each between 0 and 255, or hexadecimal, or by name, or some other method). 

Or can this whole business now be done neatly with gnuDraw?  I note that gnuDraw, while no doubt excellent, has no examples in its documentation, so I've no idea how to actually use it.

Note: I've checked out color.spad, palette.spad, and view2D.spad, but without a couple of examples I'm somewhat at sea.

cheers,

Alasdair

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