Class: harmonograph
http://www.astro.umd.edu/~eshaya/astroont/owl/geometry.owl#harmonograph

shape

twoD_Shape

curveOnPlane
 harmonograph

curveOnPlane

twoD_Shape
Annotations
 definition: "Path of double pendulum at a right angle Curves generated by the parametric equations x(t) = A(t)cos(wx*t  deltax y(t) = B(t)sin(wy*t  deltay Where A and B decay exponentially with time." (string)