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

Colored marker on paper

Watercolor on paper

Colored marker and black ink on paper

Colored marker on paper

Red felt-tipped pen on paper

Colored marker and black marker on paper

Black ink on paper

Red and black marker on paper

Black marker and black ink on paper

Colored marker and black ink on paper

Paper

Red and black marker on paper