Victor Vasarely's research is based on a form of geometric constructivism which, starting from concretist experiences, makes a fundamental contribution to the affirmation of kinetic and visual art. In 1955, on the occasion of the Le Mouvement exhibition at the Denise René Gallery, Vasarely published the Yellow Manifesto, a program of movement and "kineticism". Between 1960 and 1965 the artist then devoted himself to a series of works in which his “plastic alphabet” evolved, creating a system based on a grid that establishes modular relationships between shapes and colors. This period, which corresponds to the production of the Alphabet Plastique and Folklore Planetaire series, is characterized by the reintroduction of color. In the first series, to which G.D.4. belongs, each painting is based on 15 starting shapes that derive from the circle, square and triangle. The variations on these basic forms are developed and painted using different color and tonal scales. Each "plastic" unit inside the grid has a first and second floor. What Vasarely creates is a programmed language that allows infinite permutations of shapes and colors to give life to unique works. In the case of G.D.4 Vasarely makes a combination of shapes - the circle and the square - dialogue with a precise choice of colors - red, blue and purple.