The grid is a visual structure that lies at the heart of contemporary art. As a graphic component in painting, it came to prominence in the early 20th century in the abstractions of the Russian painter Kazimir Malevich and the Dutch-born Piet Mondrian . In 1912, the latter, began to create his "compositions," paintings constituted by grids of horizontal and vertical black lines in three primary colors. The use of the grid evolved over the course of the century. During the late 1950s, artist Agnes Martin began to draw lines that formed organizational sequences constructed on a rational system; it defined her final break from representational painting. These paintings foreshadowed Minimalists and conceptual artists such as Sol LeWitt who started to draw directly on walls, using the grid as a simplified format that excluded representational images. The wall drawings evolved into a set of precise and mathematical instructions that the artist would have a third party carry out, so that his own hand did not touch the artwork. All over the world, the next generations of artists have continued to draw on its form. Sarah Morris’s large paintings take the shape of a flat map of streets usually associated with grid structures. Meanwhile, Robin Rhode's photographs, grids translate into action, creating a sense of motion—he calls them “moving images.”