Symmetric serpents [From the Editor]

You may or may not have a read a delightful children\´s book titled Mr. Slow. The "problem" with poor Mr. Slow is that he does everything, well, slowly. He\´s a kindly man who can\´t find his proper place in the world due to his unusual trait, until he finds out that he\´s ideally suited for the patiencedemanding task of driving a steam roller.