%% 
%%  A DANTE-Edition example
%% 
%%  Example 30-02-19 on page 596.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}

\usepackage{pstricks-add}
\SpecialCoor

\begin{document}
\begin{pspicture}[showgrid](3,1)
 \psforeach{\nA}{0 0.5, 1 sqrt 0.5, 2 sqrt 0.5,
  3 sqrt 0.5, 4 sqrt 0.5, 5 sqrt 0.5, 6 sqrt 0.5}{%
    \psdot[linecolor=blue,dotscale=2](!\nA)}
\end{pspicture}
\end{document}