GEO-OpenStreetMap. DOC-Culture_libre_(en) ART-Pliages_papiers-Linda_van_Breemen. ART-Knotology, the art of creating spheres from strips of paper. Projects The second project: A sphere of colored strips. Take 6 strips with a length of 12 times the with. In our example we will use 6 strips of 2cm x 24cm in the colors purple, blue, green, yellow, orange and red. DOC-Gallica, bibliothèque numérique - Plus d'un million de livres et de documents gratuits.