‘Subsets’ is a work phase based on the 11-d hyper-cube. The algorithm I wrote selects a subset of cubes from a repertoire of 42240 cubes inherent to the 11-d hyper-cube and decides which sides shall be black or white. Clipped by a defined window, this structure rotates in front of a green background. Since the above mentioned subset is by definition incomplete, the green background occasionally becomes visible, as the structure is rotating in 11-dimensions. Based on these algorithms and without losing the geometric and systematic content of my work, I approach through logic a seemingly chaotic visual system, which I refer to as visual music. It is symbolic of action painting and free jazz, the things which were very important to me as a young artist in the early 60’s.