Hi 
Aphrodite,
to tell you the true, I did not think in set it as STATIC. Since it is in the "local group" scope.
I´m thinking like a programmer, inside a function, we do not make a variable static just to access it.
I would think in use it as static if I would use this code in other object and want to keep its value (because each instance would delete its content)
But now, understanding that when Wait() is called the Function end ("cleaned"), keep it static makes sence.
Am I correct?