Quick scripting question

[xux]

Hey fellas, I'm trying to set up a script to equip a energy ring once a certain amount of creatures are on the screen.

I noticed the following code given by another user on a thread:

RingCreature-Equip = 3 ; How many creatures at which you will equip the ring? (0 to disable)

My question is, where do i write this is? Thank you for the help in advance!

This is only setting up a variable, so on top would be most logical.