LaTeX.org

Hello,
I'm starting using tikz for drawing a lot of mindmaps and I need environments or commands to simplify the task. So I
defined an environment for a mindmap like this:

\newenvironment{tree}[2]{
\begin{center}
\tikz \draw (0,-10) node [anchor=east,fill=orange!20] {some title};
\tikz[mindmap ...