This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com
I created this applet by reading the following PDF.

This link to an applet is given in the reading http://www.dean.usma.edu/math/people/Peterson/geogebra/true3d.html
I learn by doing - and my applet can be saved to your computer (save as).

This also lead me to http://www.dean.usma.edu/math/people/Peterson/geogebra/mathlets.html which looks good.