D-art collective from Dong-A University combined doors of all different colors and kinds to activate the imagination that there may be one door for entrance but many doors for exit. Although this work is fixed in one place, it was produced in the shape of the constantly-moving blue crab in order to propose mobility and directivity. When the viewer enters the work through a door, he or she must pass and move through the door and different spaces in the four planes in order to exit. The various ins and outs of the work lead the audience to the direct experience of Dadaepoocean, as a place of trade prosperity in the past.