block inDesign to queue a new script while code is still running

I've created an arbitrary keyboard shortcut (cmd+shift+L) to automatically run a specific script.

If I press the keys 4 times in a row, the script starts running and when it finishes, the second starts right away (and it repeats the process until it runs the script for 4 times). Is there anyway to 'block' this?

I would like to, even if I press the keys multiple times, inDesign runs the script just once and only after it finishes that would allow me to run the script again (by pressing the keys shortcut).

Any ideas?