1. How would I make a proc that uses holding down a key to continue, e.g. a proc that checks if a certain key is being held down in order to continue running? Or is it a matter of just checking if a variable is read as TRUE when it is used, and maintains it?

2. How would I make a proc run by double tapping a key? Is it just simply having a variable that reads TRUE when it is run first, and does the proc if the variable is read TRUE? or is there a more effective way to do that?

Thanks for any help.