kijkvorm 2
I am standing on a horizontal wall of about 1.50 metres high and 12 metres long, which is perpendicular to a blind brick wall of about 20 metres high.
Attached to my head I am wearing an armature with two halogene lamps on a battery, projecting a small clear spot of light on the blind wall, just above the end of the horizontal wall. By small forward movements of my feet, I shift from the beginning of the horizontal wall in the direction of the vertical wall. Parallel to the shifting of my body, I change the position of my head in such a way that the spot of light gradually moves upward, thus changing its form. When I am standing against the wall, the spot of light has changed into a long beam, which floods the entire height of the wall.