The Kunsthalle Wien contacted thirty workers who had been recommended to them. They sought persons of various skin colors -from very light to very dark- to be arranged side-by-side. The persons were contacted by telephone and asked where they came from. From this, their skin color was deduced. As soon as a sufficient number of people for the desired spectrum of shades were thought to be available, the persons involved were called together. The first 27 persons to arrive were arranged in their underwear with their faces to the wall. Those involved who had the appropriate mixture of white and color turned up when the action had already ended. This can be seen in the result: the in-between shades are missing.