This is an example of how very simple ideas can be combined to give a useful motif. A line and a squiggle combine together to give the impression of a fine (or not so fine) toothed comb. What could be simpler? You could almost argue that it doesn't merit the label of 'motif' . And yet put these two elements together and you get rhythm and texture in a very pliable way. You can see that one of the characteristics of this stitch is that it opens and fans easily to go around even very tight corners. The length of line and number of squiggles can be increased or reduced to fit any width required. All round, a very versatile pattern.