How to make a variable that spans across multiple scripts?

local Cool = true

while Cool == true do
        game.ServerStorage.Value.Value = false
wait(3)
    print(game.ServerStorage.Value.Value)
        game.ServerStorage.Value.Value = true
wait(3)
    print(game.ServerStorage.Value.Value)
end

This is my code that i am just using for testing loops and BoolValues.

The while loop I made functions completely fine, although I want to change the value of Cool (The variable) to false.

I want to know if there is any way to change the values of a variable from another script, and if so , how.