depicted them like this.
*RESIZE This is the second version of this particular design that I've uploaded. I originally intended the first to look like this, but the repeat didn't line up exactly. I ended up using the mirrored repeat option on the first one, which turned out nicely, so I decided to keep it. I have been fascinated with Celtic design for many years, particularly the knotwork and zoomorphic designs. This has been something I'd been meaning to try for a while. Pen on paper, scanned as pure black and white and finished in Photoshop.