This demo includes two graphical display windows.

The window "Curve: X(t)" displays the curve X(t), the point X(t_{0}),
and unit tangent, principal normal, and binormal vectors T(t_{0}),
P(t_{0}), and B(t_{0}), with their tails at X(t_{0}).

The window "Unit Tangent (T), Unit Normal (P), and Unit Binormal (B)"
displays the unit tangent, principal normal, and binormal
vectors T(t_{0}), P(t_{0}), and B(t_{0}) and
the unit sphere on
which their heads are constrained to lie.

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 there is a "Show Color Spectrum" checkbox.