function BitsPlusGray(screen)
% BitsPlusGray(screen)
%
% Put a gray ramp in the Bits++ box.
%
% 10/07/03  dhb  Wrote it.

grayClut = linspace(0,2^14-1,256)'*ones(1,3);
window = Screen(screen,'OpenWindow',0,[],32);
Screen(window,'SetClut',(0:255)'*ones(1,3));
BitsPlusSetClut(window,grayClut);
Screen(window,'Close');
