This demo includes one graphical display window that shows the curve X(t) and the point X(t0).

The control window displays the arclength L of X(t), the area A enclosed by X(t) if X(t) is a simple curve, and the ratio L2/4πA, which is always greater than or equal to 1 according to the isoperimetric inequality.

Change the value of t0 and other variables as in earlier demos.
As in earlier demos, there are "Show entire curve" and "Show Color Spectrum" options.