Thank you all for your comments and help. Good advice there Bev .. it means that trying to do it that way you can see something but no-one else can
I'm glad no-one could hear my anglo-saxon language last night .. the computer nearly went out of the window on a few occasions!
And .. being of the ballroom/R&R era, this isn't a 'disco' ball to me at all. Rather it conjures up a big ballroom/lights out/just that ball flashing around. *sigh*
Anyway, another problem solved. Thanks again everyone ... on to the next query!
Onward and upward

~Lily~
First Sydney Ammiratore and "A Usual Suspect"
"If music be the food of love, play on"