EXPANSIONCONTRACTION (Faster the speed  smaller the circle).
When equilateral triangles are drawn (sides equalling the
vertical segment in the circle), and a series of circles divided by half the
previous circle are constructed the natural limits of this progression ends at
the fifth circle. If time values are given to these circles, as well as tone
value, the time value becomes a whole tone for the first circle, succeeded by 2,
4, 8, z, ¦,... a reasonable limit.
