How do I create and access global variables?

Questions
1

I am creating a tic tac toe game and need global variable to keep track of which spots have been filled. I think I can figure it out if I just see how a global variable is created and accessed in general.

2

Any variable within a component is global to that component. To use them across components, you access them as componentName.script.variableName.

If you are talking about within the graph itself, all variables are global.

3

Are you familiar with Actions and Ticker in a graph?

4

Thank you! This is just what I needed

5

No, I am not familiar with that