Conic Sections.
After uncompressing the zip file (see the link at the bottom of this page), run the program Conic_Sections. You will be asked to input the coefficients of a general conic. Follow the directions on screen. Once you've entered your coefficients, the following GUI will be presented.
Conic Sections.
The sliders will adjust the red, green, and blue components of the color of the conic section. The radio buttons select the line style.