\font\Myfont=ptmb8r scaled 18000  % postscript font (times bold) in very large
                               % so the font will not be part of the ps file
                               % a normal TeXfont would be i.e. cmr12
\hsize=8.0in   % paperwidth
\vsize=11in    % paperheight (we use landscape)
\hoffset=-0.75in % normally [La]TeX has 1in margin all around
                % but for large signs we want to write all
                % the way to the border
\parindent=0pt  % no indentation for the first word of paragraphs
\Myfont
$\vcenter to \vsize{\vfill%
  \hbox to \hsize{W e l l !}\vskip 9mm%
  \hbox to \hsize{H o w}\vskip 9mm%
  \hbox to \hsize{a b o u t}\vskip 9mm%
  \hbox to \hsize{t h i s ?}%
\vfill}$

\bye
