It's What's Inside That Counts

I would like to create a photo image of a line of people holding hands. The people along the line vary in skin color, from the whitest albino skin tone on one end to the darkest African skin tone on the far end. In between are enough people so that between any two people if you panned in you couldn't tell there was any skin color difference between the, but panning out and looking at the whole line you see a graduated variation in skin tone. The picture can be taken in any environment but must get across the idea that differences in skin tone are inconsequential in judging people - that there is not any one point where someone can be defined as being white or black.