Untitled (notes on alternatives to Feuerwerk, left page); Untitled (sketch for Kunstmuseum Celle, right page)

Black marker and blue ink on paper

Black marker and blue ink on paper

Colored marker on paper

Red and black marker on paper

Black marker on paper

Colored marker, black ink, and opaque watercolor on paper

Colored and metallic marker on paper

Colored marker and blue ink on paper

Blue and black marker on paper

Colored marker on paper

Colored marker and black ink on paper

Colored marker and black ink on paper