Unlike in LeWitt's earlier work these prints are not the outcome of a series of logical moves. The images are expressive and subjective and not determined by any system. They are in fact close in spirit to the works of Jackson Pollock against whose seeming randomness artists such as LeWitt were reacting in the early 1960s. To the extent that they are not actually interdependent these prints are not serial. They depict pyramidal shapes which relate closely to his three dimensional works and wall drawings of the period. To create them he used a hardground black line overlaid with grey spitbite.