˄ 144. Modellering schuimplastic heuvel 1 (shaping foam rubber hill 1) ˄ 145. Heuvel 1 (hill 1) ˅ 146. 2013, Schets heuvel 1 (sketch hill 1) ˄ 143. 2013, Collage, ontwerp vloer en heuvels (design floor and hills) 99