I would suggest that the artist used numbers (1,2,3..) to indicate where pieces hook up to their mates when assembling. His color code was a little difficult to figure out between light pink, dark pink etc.
Noah Li-Leger At Sundown Mobile
Made of painted sheet steel and steel rod. Hangs 25" tall by 80" wide. For shipping ease, minor assembly is required. Handmade to order in Canada. See "Additional Information" tab for typical lead time.
Availability: Ships within 2-3 weeks via Canada Post from British Columbia.
Shipping: Calculated at Checkout