The tesseract at left is rotating into a fourth dimension.
Use your left mouse button to see the rotation from different angles.
Use your right mouse button (or on a Macintosh, the mouse button with the command key held down) to experiment with different four-dimensional rotations. This works best if you click in the exact center, and then drag outwards in some direction.
The color represents the distance into the fourth dimension. Red is
Please be patient while the applet is downloaded . . .