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

Colored marker and opaque watercolor on paper

Red and black marker on paper

Colored marker on paper

Colored marker and black ink on paper

Ink on postcard

Black ink on paper

Paper

Ink on mat board

Colored marker on paper

Colored marker on paper

Blue and black marker on paper

Colored marker and opaque watercolor on paper