restarting a script after user input is completed

Good Morning Everyone,

I have a script that needs users to change parts of an excel document before the script can continue. However I need to give them time to change the file before it continues to run.

Can someone point me in the right direction on how to accomplish something like that?

I guess I'm looking for some type of timer window or message box that would say "Finished with changes" then they could pick yes or no if yes then the script would continue. if no it would give them additioal time say 5 minutes. and if they try to close the window it restart the message window again so they could push yes or no.

Any idea's or places to start.
Thanks as always, Mike