\input{preamble-standalone.ltx}
\begin{document}

% Ex. No. 67 (Section  8.7.1 : Example with \tkzcname{tkzDefPoint} and \tkzcname{tkzDrawPoints} )

\begin{tikzpicture}[scale=.5]
   \tkzDefPoint(1,3){A}
   \tkzDefPoint(4,1){B}
   \tkzDefPoint(0,0){O}
   \tkzDrawPoints[size=8,color=red](A,B,O)
\end{tikzpicture}

\end{document}