A type of “writing” named for this concept titles a Man Ray photograph in which his signature appears in penlight over a self-portrait, often called the first light painting. The “White Manifesto” prefigured a movement named for this concept that was led by the canvas-slashing Italian painter Lucio Fontana. This concept and “light” provide an alternate title for the “Light Prop for an Electric Stage,” a rotating kinetic “modulator” by László Moholy-Nagy (“LOSS-low MOH-ho-lee-NAHJ”). This is the last word in the title of a sculpture of the “Development of a Bottle” and of another sculpture by the same artist that depicts a body in motion; (-5[1])that bronze Futurist sculpture by Umberto Boccioni is titled for “Unique Forms of Continuity in” this concept. (10[1])For 10 points, empty parts of a canvas are called what concept’s “negative” (10[1])form? ■END■ (10[1])