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Hélio Oiticica (Portuguese: ��ˈε����� ɔ���ʃ��ˈ������ɐ��; July 26, 1937 – March 22, 1980) was a Brazilian visual artist, sculptor, painter, performance artist, and theorist best known for his participation in the Neo-Concrete Movement, for his innovative use of color, and for what he later termed "environmental art," which included �ʲ������Բ��DZ�é�� and Penetrables, like the famous �հ��DZ辱��á������. Oiticica was also a filmmaker and writer.