Global Variables, how do they work?

I am attempting to have one script with a boolean variable determine if another script should run.

I seem to be having trouble getting the variable to transfer over though.

This is a basic summary of what I am trying to do. (Rather than throwing my entire block of code at you)

Script 1:

start = true

Script 2:

while true do

while start do -- "start" is used here
    -- Blah blah blah, code here.  (Nothing that affects "start")
wait()
end

Is this how I would use non-local variables inside other scripts?

All the scripts that use such things are running when I run my environment (I have a "while true" keeping them running in the background).

However, script 2 never goes through that second while loop.

Anyone have ideas?

Thanks