Different sources list slightly different principles
of design. Some suggest rhythm and pattern are separate
from repetition, others combine them with movement. Some do
include unity or another one of the principles listed on the this page.
Unity is listed on this website as "and sometimes unity" because, in my
opinion, it is a little different then the other principles.
the other principles are a comparison of one part to another
part within an artwork. Unity is looking at all the
into a whole. As the principles are created by how the
applied, I would argue that the unity of a piece is created by how the
principles have been applied.