In our approach a 3-form is not an object that exist in addition to the metric, it is the only object that exist and in particular the 4D metric, is defined by the 3-form.
This is managed within twelve (12) flows (A: to W:). Each flows is representing a certain period which is converting the three (3) layers of 19 cells with a cumulative sum of 1, 7 and 19 in sequence as explained before.
As we've already suggested, the number 30 figures large in our modulo 30 domain. The Prime Spiral Sieve is Archimedean in that the separation distance between turns equals 30, ad infinitum. The first two rotations increment as follows:
The first diagram corresponds to the first term at right hand side of equality, while the other two diagrams with back-moving lines combine to produce the second term.