The principles of design are the thinking behind what you put on the paper

Unity (repetition) is a principle of design.  

• by using similar shapes
• by using similar patterns, line, shape, colour, value, texture
• by using a common background
• all elements function as one

 Meanings can be attached to unity by repetition

• a sense of oneness
• helps unify a design
• a feeling of organised movement

 Learn more here at visual literacy,