Mobile vertical bars, changing their width and brightness, where a first bar, in the sequence of movements on the left edge of the motion marker, appears lightest and a second bar, in the sequence of movements on the right edge of the motion marker, appears darkest; between the first bar and the second bar, in the sequence of movements, a third bar is depicted, said third bar having an average brightness less than that of the first bar and more than that of the second bar; In the sequence of movements, the third bar becomes clearer and wider and the first bar and the second bar become narrower, in which the first bar also becomes clearer and, at the end of the sequence of movements, narrower and narrower until it disappears completely at the left edge, after which the sequence of movements is repeated in such a way that the old third bar, when the sequence of movements is restarted, acts as the first bar; the total duration of the sequence of movements is 5.76 s
Color is not claimed as a feature of the mark.