Untitled (notes, left page); Untitled (sketch for Kunstmuseum Celle, right page)

Black ink on paper

Colored marker and black ink on paper

Colored marker on paper

Red felt-tipped pen on paper

Watercolor on paper

Black paper

Colored and metallic marker, and black ink on paper

Red and black marker on paper

Mixed media

Colored marker, black ink, and opaque watercolor on paper

Colored marker and red felt-tipped pen on paper

Ink on mat board