A grid of small squares shifts across a luminous spectrum, moving from cool cyan and magenta at the top through deep violet and fuchsia toward the bottom. The iridescent surface catches light in overlapping layers, creating a shimmering effect that suggests movement and depth within a deceptively simple geometric structure. Printed on smooth white card stock and made to order, artwork on the front, blank inside, envelopes included in every set. A handwritten note that arrives as an independent artist's work.