This demo includes a single graphical window that displays the curve
X(t), the point X(t_{0}), the position vector X(t_{0}),
and the tangent vector T(t_{0})
with its tail at
X(t_{0}).

You can change t_{0} and X(t) in the control window. The
control window
includes a list of functions that you can use for X(t), along with
parameters used to define those functions.

As in previous demos is a "Show Color Spectrum" checkbox.