B... CONTRACTS

This drawing shows how B might contract with an arc of 120 degrees...
The radius is taken to be five units. Each unit is 10 degrees of arc...
From the basic unit, it is then conceivable to determine the proportions of each triangle to itself or to the others.
The reason the cubes are indicated is that a triangular form of three sides seems to indicate a three dimensional form, especially if each side is projected.
The right side of the drawing shows how an axis could be arranged on a circular form. Lines were then drawn to each ratio... The solid lines show how notes could cross over from one multiple to another...