The document summarizes the Brazilian Neo-Concrete art movement which emerged in the 1950s, influenced by European geometric abstraction. Key artists discussed include Max Bill, Helio Oiticica, and Lygia Clark. Oiticica began creating interactive "Neo-Concrete" works and later his "Parangole" costumes. Clark also made geometric sculptures that invited interaction, transitioning in 1964 with her piece "Caminhando" involving a Möbius strip form.