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

Ink on postcard

Paper

Colored marker and opaque watercolor on paper

Black marker and blue ink on paper

Colored marker and opaque watercolor on paper

Colored marker and black felt-tipped pen on paper

Ink on postcard

Red and black marker on paper

Colored and metallic marker, and black ink on paper

Colored marker on paper

Colored marker on paper

Mixed media