My own design. Learned the basic zigzag from Yvonne King/myamari.com See the green Alternating / zigzag cellini necklace for links & info,

Beads used (color code):
15/O Japanese (all came from Garden of Beads at BABE show) https://www.gardenofbeadin.com/
(J4105) Crystal Clear Transparent Iridescent
(J9266) 2 Tone Lined lt. Amethyst Purple
(J496LV) Irridescent Very Lt. Lavender Purple AB

11/O Miyuki Delicas:
Red Orange Transparent (DB0704) in Zigzag section (Replaced with red ~2mm Czech Fire Polish in regular Cellini section)
Black Opaque (DB0010) Replaced with 10/O gun metal (origin unknown - very consistent size & shape-probably Czech though loose, not on hanks)
White Opaque (DB0200)