\documentclass{article}
\usepackage{web}
\margins{0pt}{0pt}{0pt}{0pt}   %% Kein Seitenrand
\screensize{180mm}{270mm}      %% Dimensionen: H\"{o}he, Breite des Dokuments

\parindent0pt

\usepackage{pstricks,pstricks-add}

\definecolor{greeceBlue}{cmyk}{1 0.6 0 0.05}


\begin{document}

\thispagestyle{empty}

\begin{pspicture}(0,0)(27,18)
%% Flagge (Verh\"{a}ltnis 3 Breite : 2 H\"{o}he)
\psframe[linecolor=white,fillstyle=solid,fillcolor=white](0,0)(27,18)

\multido{\iA=0+4}{5}{%
\rput(0,\iA){\psframe[linecolor=greeceBlue,fillstyle=solid,fillcolor=greeceBlue](0,0)(27,2)}
}

\psframe[linecolor=greeceBlue,fillstyle=solid,fillcolor=greeceBlue](0,18)(10,8)

\pspolygon[linecolor=white,fillstyle=solid,fillcolor=white](0,12)(4,12)(4,8)(6,8)(6,12)(10,12)(10,14)(6,14)(6,18)(4,18)(4,14)(0,14)
\end{pspicture}
\end{document}
