This dramatic design would be very impressive hanging on your wall or for use as an afghan. I always think it looks like giant knitted cables. Others see the shapes as spirals.
You can make more, or fewer, rows of cables, as you wish.
The original afghan was made using Chunky (Bulky) weight yarn but the instructions explain how to make it in any yarn of your choice.
This is not a conventional knitting pattern. If you can knit garter stitch you can make this. It is suitable for beginners and experienced knitters, or even for two, or more, people working together. You do not have to work to a particular gauge.
A sheet is included where you can plan your own colourways before you begin.