The user interacts with a set of square elements which have three
states. The first is the initial state, in the second state these
elements grow, and in the last one they disappear in a kind of explosion.
In order for these elements to develop these three states, it is
necessary that user walks towards the screen. So, the exhibition
room must be like a passage at the end of which the user finds the
screen, along this corridor it is necessary to distribute the loudspeakers.
The initial state, corresponds to the user's position at the beginning
of the corridor, for the second state the user must be in the middle
of the corridor, more or less, and the last one the user must be
in front of the screen.