Dana plays with shadow to create optical illusions and giving the viewer the impression of movement, stressing the relationship between form and function, exploiting different phenomena; ambiguous figures and reversible perspective; line interference; chromatic vibration and different viewpoints and the superimposition of elements in space.

Two semi-spheres acts as foreground and background in a tense and contradictory juxtaposition. Creating two patterns of lines with a single common point, in this case is the cable that holds all the system.