Spinel’s background as an architect has a clear influence on his approach to drawing; that is, through a technical, schematic, and modular process of representation. The structures and facades portrayed in these drawings arise from the artist's interest in a process known in construction as bricklaying, which refers to the form, structure, or constructive display of a wall.

The starting point of this series of drawings is the line, or rather, the repetition of lines, which, like walls, build shapes and volumes. It is in the process, in that act of repetition and therefore of time, where the line acquires its volumetric quality, because, as the artist himself expresses: "the value of the line does not reside as an independent unit but as part of a whole". That is precisely how these drawings become walls built by lines.