A vibrant composition of undulating parallel lines rendered in bold gouache, Waving Lines exemplifies Sol LeWitt's systematic yet expressive approach to mark-making. The rhythmic, hand-drawn waves ripple across the paper in rich, opaque color, balancing the tension between strict conceptual instruction and the subtle organic variation of human execution. This work reflects LeWitt's enduring interest in the generative power of simple rules to produce visually dynamic and meditative results.