Untitled (blank, left page); Untitled (notes with "Rasterbild" sketches, right page)

Red marker and black pen on paper

Graphite and watercolor on paper

Colored crayons on paper

Black crayon on paper

Paper

Colored marker on paper

Graphite, ink and white wash on composition board

Colored marker on paper

Colored crayons on paper

Graphite on paper

Black ink on transparent paper

Black marker on paper