[Newbie] Alternative for static const...

Hi all,

For programming my Lego Mindstorms NXT I have to use codes like 16r1F.
But I actually want to be able to use "readable" codes. In a language
like Java I will do that with a static const, but as far as I know I
have to do it with symbols in Smalltalk.
How do I create a symbol so that it is accible by all the classes?

Thanks in advance,

Mispunt.