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
Piet van der Walt the SWAPO Youth League. He retained his parliamentary seat in the 2014 general elections and was subsequently appointed Deputy Minister for Industrialisation, Trade and SME Development. After a Cabinet reshuffle in February 2018 he swapped positions with Lucia Iipumbu and is since then Deputy Minister of National Planning. Piet van der Walt Piet Jacobus van der Walt (born 14 January 1966 in Okahandja) is a Namibian businessperson and politician who has been the Deputy Minister of National Planning since 2018. Van der Walt grew up in Okahandja and went to primary school there. His secondary school was the Higher Technical