Mathematics and art through the strings as with a bird cage and to see one form within another which excited me." The artists Theo van Doesburg and Piet Mondrian founded the De Stijl movement, which they wanted to "establish a visual vocabulary elementary geometrical forms comprehensible by all and adaptable to any discipline". Many of their artworks visibly consist of ruled squares and triangles, sometimes also with circles. De Stijl artists worked in painting, furniture, interior design and architecture. After the breakup of De Stijl, Van Doesburg founded the Avant-garde Art Concret movement, describing his 1929–1930 "Arithmetic Composition", a series of four black
Pieter Voltelyn Graham van der Byl a very popular and respected figure by both opposition and government. In parliament, a National Party politician asked the speaker of the house if they could refer to van der Byl as "Oom Piet" (which is an Afrikaans term of respect, meaning "uncle Piet"), this was duly granted and van der Byl was henceforth known as "Oom Piet" in parliament and in the media. During his years in opposition, van der Byl's views on National Party government policy never changed, he vehemently continued to openly criticise the Apartheid regime for its extreme suppression of the non-white population and its transformation