This screensaver shows on your screen various three-dimensional shapes (polyhedrons) rotating and morphing one to another.

There are 20 shapes - cube, sphere, torus, tetrahedron, octahedron and others. The edges of shapes are constructed from small balls.

You may choose color and size of balls, change axis and speed of rotation.

This application demonstrates the curious relationships wherein a tetrahedron can be inscribed in a cube in two different ways and a cube can be inscribed in a dodecahedron in 5 different ways. It also demonstrates a kind of quantum fluctuation or beating as a heart does, in which the tetrahedron oscillates back and forth between the two positions in which it can be inscribed in the cube, and in which the cube oscillates within the dodecahedron.