What year did Lillian Shwartz complete her Pixillation piece and where did you find your information?
This is the description on wikipedia
She made one of the first digitally created films to be shown as a work of art, Pixillation, which shows diagonal red squares and other shapes such as cones and pyramids on black on white backgrounds.
Pixillation was introduced by Lillian F. Schwartz in 1970. It is listed on her website, www.lillian.com. See the link below. It is also tagged with the following: 1970, Color, Animation, Sound, hand painted, special effects, editing techniques, special effects.
The piece was commissioned by AT&T and is part of the collection at the Modern Museum of Art. Its awards include the Red Ribbon Award for Special Effects from The National Academy of Television, Arts & Sciences; The Smithsonian Institution and The United States Department of Commerce, and Travel Services for Man & His World at the Montreal Expo 1971.
Roger Greenspun of the New York Times wrote: “With computer-produced images and Moog-synthesized sound Pixillation is in a sense an introduction to the electronics lab. But its forms are always handsome, its colors bright and appealing, its rhythms complex and inventive.”