Skip this at the first reading

We have made some global definitions which might spoil further work. We therefore undefine the points. It is achieved by assigning whatever. It is done here for safety because the examples are extracted from several {\logo META}{\logo FONT} files designed by the author and the global definitions might interfere with something. However, a normal user usually does not need it.
\begin{mfcode}
for k:=0 upto 60: z[k]=(whatever,whatever); endfor;
\end{mfcode}