\documentclass{article}
\usepackage{web}
\margins{0pt}{0pt}{0pt}{0pt}   %% Kein Seitenrand
\screensize{150mm}{250mm}      %% Dimensionen: H\"{o}he, Breite des Dokuments

\parindent0pt

\usepackage{pstricks,pstricks-add}

\definecolor{bulgariaRed}{HTML}{D62612}
\definecolor{bulgariaGreen}{HTML}{00966E}

\begin{document}

\thispagestyle{empty}

\begin{pspicture}(0,0)(25,15)
%% Flagge (Verh\"{a}ltnis 5 Breite : 3 H\"{o}he)
\psframe[linecolor=white,fillstyle=solid,fillcolor=white](0,10)(25,15)
\psframe[linecolor=bulgariaGreen,fillstyle=solid,fillcolor=bulgariaGreen](0,5)(25,10)
\psframe[linecolor=bulgariaRed,fillstyle=solid,fillcolor=bulgariaRed](0,0)(25,5)

\end{pspicture}
\end{document}
