A later stage was to repeat the squares with varieties of colour; and also to introduce details into the squares, and so make them compound patterns, as in the XVIIth dynasty at El Kab, where the sequence of the blue, green, and red lines makes a brilliant effect from these simple elements. Not only a square, but also a hexagon, was worked into the same design. This, from the nature of it, suggests a rush-work screen, and probably it was plaited with rushes in three directions, and hence the production of this particular angle. The previous zigzag patterns all suggest weaving; and in some in Ptah-hotep’s tomb (Vth dyn.) closely woven and complex zigzag patterns are shown which are evidently copied from textiles, as we shall see further on in the chequer patterns.