Pstricks graphics

The following pictures are generated in LaTeX using the pstricks package. To get the according pstricks code just click on the pictures.
In order to use this code in your own LaTeX documents you will have to put

\usepackage{pstricks, pst-plot, pst-node}
\usepackage{xcolor}

in the header section of your document and then use latex (not pdflatex) to translate.
If for some reason you want to use pdflatex to translate directly to pdf there are several possibilities described on the pstricks website.