A series of explorations of the quadradius modular system. At first only a pencil was used to explore a wide range of possible form variations concentrating on the basic principles of repetition, alternation, rotation, and gradation. Within a 25-unit structure constellations were then drawn out on paper and reworked on the computer in black. Four studies of the 25-unit grid were then chosen and translated into a numerical system, with the gradation principle as well as color.