% --------------------------------------------------------------------------
% Signal Flag N:
% --------------------------------------------------------------------------
\begin{flagdescription}{1}
\SignalFlagColorDefinitions
\background{white}
\foreach \x/\y in {1/0,3/0,0/1,2/1,1/2,3/2,0/3,2/3}
  {\fill [blue](\x/4*\flaglength,\y/4*\flagwidth) rectangle ++(\flaglength/4,\flagwidth/4);}
\framecode{}
\end{flagdescription}