Watch this chair flip. Notice how the axial hydrogens (in red) are converted to equatorial hydrogens (and vice versa). Check out the cool shadow at lower left. See below for how I put together this animated GIF file.

HyperChem Lite (by Hypercube) was used to construct models of the beginning and ending chair forms as well as the intermediate half-chairs and boat. The Hyperchem file was converted to xyz format using Babel (Dr. Jeffrey J. Gosper)and Re_View (Dr. Jeffrey J. Gosper) was then used to insert steps to smooth the animation and color the axial hydrogens red. Using the Re_View animation module, POV-ray (Chris Young) was used to create ray-traced images of each frame in the animation and then DTA (Dave's Targa Animation Program) was used to create the ray-traced animation in .FLC format. Finally, FLI2GIF(Jeff Lawson) was used to convert the .FLC file to the animated GIF you see here. All programs (except HyperChem Lite) are freeware or shareware and are available on the net.