\documentclass[a4paper,10pt]{article}

\usepackage[utf8]{inputenc}
\usepackage[french]{babel}
\usepackage[T1]{fontenc}
\usepackage[a4paper,twoside,left=1.5cm,right=1.5cm,marginparwidth=1.5cm,marginparsep=2mm,top=2cm,bottom=2cm]{geometry}
%\usepackage{makeidx}
%\usepackage{multido}
%\usepackage{pstcol,pst-char,pst-text,pst-plot}
\usepackage{pstricks}
\usepackage{pst-all}
\usepackage{pst-char}
\usepackage{pst-coil}
\usepackage{pstcol}
\usepackage{pst-eps}
\usepackage{pst-fill}
\usepackage{pst-grad}
\usepackage{pst-key}
\usepackage{pst-node}
\usepackage{pst-plot}
\usepackage{pst-text}
\usepackage{pst-tree}

\begin{document}
\begin{pspicture}(0,0)(6,6)%\psgrid[gridcolor=lightgray,gridlabels=0pt]
\psline[linecolor=red](1,1)(5,1)(1,4)(1,1)
\pscurve[linecolor=green,linewidth=2pt,showpoints=true](5,5)(3,2)(4,4)(2,3)
\pscircle[linecolor=blue,linestyle=dashed](3,2.5){1}
\end{pspicture}
\end{document}


%%%%%%%%%%%%%%%%%%% MESSAGE ERROR %%%%%%
[PDFLaTeX] dm.tex => dm.pdf (pdflatex)
[PDFLaTeX] terminé avec l'état de sortie 1
./pstcol.sty:0: ************************************(pstcol) The package `pstcol' is obsolet!(pstcol) You should use `pstricks' directly:(pstcol) \usepackage{pstricks}(pstcol) ************************************.
./pstcol.sty:21:Option clash for package pstricks.
./dm.tex:26:Undefined control sequence. \psline[linecolor=red](
dm.tex:26:Undefined control sequence. \psline[linecolor=red](
dm.tex:27:Undefined control sequence. \pscurve
dm.tex:27:Undefined control sequence. \pscurve
dm.tex:27:Undefined control sequence. ...olor=green,linewidth=2pt,showpoints=true](
dm.tex:27:Undefined control sequence. ...olor=green,linewidth=2pt,showpoints=true](
dm.tex:28:Undefined control sequence. \pscircle
dm.tex:28:Undefined control sequence. \pscircle
dm.tex:28:Undefined control sequence. ...linecolor=blue,linestyle=dashed](3,2.5){1}
dm.tex:28:Undefined control sequence. ...linecolor=blue,linestyle=dashed](3,2.5){1}
dm.tex:28:Undefined control sequence. ...linecolor=blue,linestyle=dashed](3,2.5){1}
dm.tex:28:Undefined control sequence. ...linecolor=blue,linestyle=dashed](3,2.5){1}
[PDFLaTeX] 13 errors, 1 warning, 0 badboxes
%%%%%%%%%%%%%%%%%%%%%%%%%%%%