Sand, as a metaphor, has great potential. Made up of millions of tiny grains, able to be molded into a shape with water and wind, all at once delicate and strong. It is as powerful as the sea and it's complete opposite.
These patterns and shapes, the tire tracks of tractors pushing the sand around on the beach, were so dynamic and powerful with the bright sunlight. The next day, after a busy Saturday of feet walking all over them, they were gone.