In this picture the repetition of the circles and colors makes this painting unified or complete.  All the parts within the painting go together with each other and are pleasing to the eye.

These lines show lines that go together with each other.  They have a rhythm to them.  Their similarities and repetition help to make them unified.

These lines are in a state of confusion.  They do not go together.  Their is no rhythm or repetition.  They are all doing their own thing.  These lines are not unified.