The phrase "zigzag lines" refers to a pattern of lines that move in a jagged or zigzag motion, like the path of a lightning bolt or the pattern created when drawing quick, sharp lines back and forth. Full definition
In the latter half of the 1960s, Reed began creating steel sculptures with Bill Truitt while also continuing to paint, producing works with zigzagging lines of color. (davidrichardgallery.com)
Previous works by Creed have taken up this theme: Work No. 1347 features 96 different types of marble in zigzagging lines to create a floor. (artinamericamagazine.com)
By 1978, with «Children Meeting,» now in the collection of the Whitney, big biomorphic splats of color jazzed by zigzag lines jostled one another. (nytimes.com)