Bridget Riley CH CBE (Born 1931)
British painter and designer central to the Op art movement of the 1960s
https://en.wikipedia.org/wiki/Bridget_Riley

Zephyr / 1976 / Acrylic on linen / 88”x42”

Eva Hesse (1936-1970)
German-born American sculptor who brought organic, emotional, and kinetic aspects to minimalism
https://www.guggenheim.org/artwork/artist/eva-hesse

Untitled (Rope Piece) / 1969-70 / Latex, rope, string, and wire / Dimensions variable