The Design.
Design is the over all arrangement of all the visual elements of a work of art.
Designing is a skill that takes some careful study to master. Like any other skill, some designers are better than others. Some artists are conscious of the Principles of Design and some are not. These art also terms used when critics describe the qualities of an artwork.

..
tHE PRICIPLES OF dESIGN
-Art principles are created by combining art elements which are the building blocks that go together to produce visual principles such as Unity, Harmony, Variety, Balance, movement, emphasis, proportion, and rhythm.
•The Harmony
Harmony refers to a way of combining similarities. Visual harmony is achieved when all of the art element within an art work is blended together. This can be accomplished by using similar types of shapes, lines, or colors within a work of art.
•The Balance
All artist must pay attention to how a work of art is balance. It refers to the way in which visual weight is distributed throughout a composition, this can be Symmetrical, Asymmetrical, or Radial Balance.
•Symmetrical balance: it refers to a composition in which the visual weight is perfectly and evenly distributed each side of the artwork. A symmetrical composition can be divided down the center and each side will be close to a mirror image of the other.