UNITY
Relating the design elements to the the idea being expressed in a painting reinforces the principal of unity

VARIETY
The use of dissimilar elements, which creates interest. Variety like a painting or some reflective wood panels added on a plain wall may be used to reduce monotony. Helps infuse color to a house decor to attempt to increase design beauty.

Movement
the picture appears to be moving or about to move

Rhythm
in interior design also may be used to reduce randomness. For example, placing four plant pots in a row and evenly spaced apart on a floor produces an organized look.

REPETITION
Repetiton with variation is interesting, without variation repetition can become monotonous

BALANCE
Balance in design is similar to balance in physics.

Emphasis-
Areas of interest. Guides the eye into through and out of the image through the use of sequence of various levels of focal points, primary focal point, secondary, tertiary, etc

Contrast-Contrast is the occurrence of contrasting elements, such as colour, value, size, etc. It creates interest and pulls the attention toward the focal point.

FORM
The simplest definition of shape is a closed contour, an element defined by its perimeter. The three basic shapes are: circle, rectangle (square) and triangle

VALUE
Value is the lightness or darkness of a color. Value is also called Tone

COLOR
Color is the response of the eye to differing wavelengths of radiation within the visible spectrum.

TEXTURE
Texture is the surface quality of a shape - rough, smooth, soft hard glossy etc. Texture can be physical (tactile) or visual.

SHAPE
A shape is a self contained defined area of geometric or organic form. A positive shape in a painting automatically creates a negative shape.

LINE
Line can be considered in two ways. The linear marks made with a pen or brush or the edge created when two shapes meet.