The photo was taken on a construction site, and it is pure floor composition. The only thing that brings the idea of floor is the shadow of a person, myself in this case.
This bring the idea of an abstract subject, counterposing with the most concrete of the man and its racional thoughts that is the civil construction.
The title, in Portuguese, the word "Obra" is used to describe the artwork and also the construction site.
So it conclude that the abstract, and the concrete, walk together.