Oiticica often worked in series, or bodies of works. The Metaesquemas include over 350 small scale paintings on card. These compositions of opaque, monochrome, geometric forms, often in primary colours, were inspired by the abstract art of Piet Mondrian and Kasimir Malevich. In contrast to the rigorous order and structure of both European artists, however, Oiticica introduces elements of instability into his works. The forms appear to jostle and bump together as though they are moving.