This demo includes a single graphical display window that displays the cylindrical helix X(t) = (a*cos(t),a*sin(t),bt). You can change t0, a, b, and X(t) and choose whether or not to show the entire curve and the position vector X(t0) in the control window. You can also choose whether or not to show the cylinder of radius a with the z-axis as its axis of symmetry, which is the cylinder on which X(t) lies.