Inserted in the thread on the study of matter and the interaction between light, particles and cosmic events, this abstract work on brass brings on the theme of relativity and the space-time relation.

In ordinary space, a position is specified by three numbers, known as dimensions. A position in spacetime is called an event, and requires four numbers to be specified: the three-dimensional location in space, plus the position in time.

The 4th dimension becomes, despite being a concept of quantum physics, basic in everyday life: "being in the right place at the right time" summarizes its essence.