A group of people start to dig a structure close to the shore.  As the digging continues more people join to dig as a pattern ensues. The digging continues and people start to add rocks in a linear fashion around the rig and dig beside the rocks and eventually cover the rocks with sand.  Finally in the tide moves up and starts to destroy the structure that was created.  In the end people observe the failing  structure and leave while a girl stands in the middle as the water moves up and destroys it completely.