The simplest. Minimal unit of visual communication is that of the point. Theoretically a point has no dimension and is defined in terms of the intersection of lines. Its concrete manifestation is the dot; but for us to see a dot, it must be on something such as this page ka two-dimensional form at. Or located In space, such as a speck of dus floating in the three-dimensional area of our immediate environment. Two dots imply a line, that is, we can connect then and have a one-dimensional object(3-2). Three dots. When not in a line. Imply a triangle, a two-dimensional shape(3-3). Dots also group and attract(3-4).