Friends only Banners, or any other kind of banners.
Size: regular size? Not sure... not too big, not too small.
Text: Friends Only (at top) Please enter your GDO code before entering the Stargate (somewhere else)
Colours: dark or what ever looks best.
Extras: If those images are no good feel free to pick a different one. If you have a better idea for the words as long as Friends Only is left I don't care what it says really. Thanks.