\input fig4tex.tex

% 1. Definition of characteristic points
\figinit{2cm}
\figpt 0:(0,0)
%
% 2. Creation of the graphical file
\figdrawbegin{}
\figset sign(color=\Redrgb, dim=0.2)
\figdrawsignC(
1 1,
-1 1,
-1 -1,
1 -1
)
%
\figset sign(shape=diamond, fillmode=no, color=\Bluergb)
\figdrawsignC(
1.414 0,
0 1.414,
-1.414 0,
0 -1.414
)
\figdrawend
%
% 3. Writing text on the figure
\figvisu{\figBoxA}{}{%
\figset write(mark=+)
\figwritep[0]
}
\centerline{\box\figBoxA}
\bye