It is a part of the rug, which is the right and the left side of Venice, the upper half, and the lower half, in the direction of the plot and role, and the coloring are perfectly consistent with each other. Its symmetrical role is based on two species: A-mmetrical role: that two vertical parts of the rug have a symmetry.b-the-counter symmetrical role: which has two horizontal halves of the rug symmetry.