Dot to Dots is a common educational game for young children. The hidden "big picture" is revealed when a line is drawn connecting a sequence of numbered dots.

I record the scribbled, smudged and torn wall in Lennon Wall Subway and imagine the constantly modified marks as the archaeological and historical objects discovered years later. I create a set of Dot to Dots worksheet with the blurry shapes, with the unrecognised ‘big pictures’ hidden inside.

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Though seeking the tiny clues with magnifying glass and connecting the dots with correction pen, an act of filling gaps and reconstructing the future history is proceed, and the unknown preset picture is being seek. Though filling the space between dots, new traces are added on the walls once again. The hidden picture eventually appears. This maybe the official model answer, or part of the truth restoration, or a new image created under the interference of the participants’ will. The only certain thing is that the walls have become unrecognisable.