The window "Curve: X(t)" displays the curve X(t) = (cos(t), sin(t), cos(2t)/c), the point X(t0), and the tangent, principal, and binormal vectors T(t0), P(t0), and B(t0), with their tails at that point.

The window "Spherical Images: T, P, B" displays the same three vectors with their tails at the origin, the sphere on which their heads are constrained to lie, and, if the appropriate checkboxes are checked, the curves that their heads trace out, known as the tangential, principal, and binormal indicatrices.

It is possible to change c and t0 and to choose whether or not to show each of the indicatrices in the control window.