The series is composed of one hundred pencil drawings on paper found in the city itself, dating from the Soviet era. A notebook in the form of a filing folder, with more than a hundred sheets drilled with three holes, proved to be the necessary, irregular and even precarious support for the drawings that began to emerge.

As a formal description, each graphic exercise aims at defining a rectangle of 97x180 mm, placed in the center of each sheet. This rectangular area, which remains unchanged throughout the series, is the addition of three vertical golden rectangles of 97x60 mm. The subsequent smaller sections that appear are the result of the partitions obtained by applying the number phi to this golden rectangle, thus obtaining modules that are repeated in an unpredictable way.

A simple graphic element, the straight vertical line, provides rhythms in a successive repetition at variable distances, corresponding to divisor numbers of 60. Variations in the thickness, the hardness of the graphite and the color of the lines, affect these rhythms and provide varying densities to each of the modules and sections of the compositions.