% A Lissanjous curve: x=sin 3t, y=sin 4t
\SCALEVARIABLEfunction{3}{\SINfunction}{\ffunction}
\SCALEVARIABLEfunction{4}{\SINfunction}{\gfunction}
\PARAMETRICfunction{\ffunction}{\gfunction}{\myfunction}
\MULTIPLY{10}{\numberPI}{\numberTENPI}
\setlength{\unitlength}{3cm}
\linethickness{2pt}
\begin{center}
\begin{Picture}(-1.2,-1.2)(1.2,1.2)
\pictcolor{red}
\PlotParametricFunction[24]\myfunction{0}{\numberTWOPI}
\end{Picture}

$x=\sin 3t,\ y=\sin 4t$
\end{center}
