Vẽ là cờ VN bằng ps-tricks

\documentclass{standalone} \usepackage{pstricks-add} \usepackage{pagecolor} \begin{document} \pagecolor{red} \begin{pspicture}(-7.5,-5)(7.5,5) \SpecialCoor \pspolygon[linecolor=yellow,fillcolor=yellow,fillstyle=solid,opacity=1] (3;90)(3;234)(3;18)(3;162)(3;-54) \end{pspicture} \end{document}