\setlength{\unitlength}{1cm}
\begin{center}
\begin{Picture}(-2.5,-2.5)(2.5,2,5)
\renewcommand{\axeslabelsize}{\footnotesize}
\cartesianaxes(-2,-2)(2,2)
\pictcolor{red}
\parabolicArc{-2}{-1}{0}
\pictcolor{blue}
\parabolicArc{0.5}{0}{2}
\end{Picture}
\end{center}
