Here are the three types of harmonies –
a. Functional -It deals with the physical working of anything placed in the design.
b. Structural — Fitting the pieces together, in a correct way is what all comes under structural harmony. It helps in both creating and setting the mood.
c. Decorative — It only includes the parts that are used for decorative purposes in a display. Props are also used to set the atmosphere as they all add up to the pre-decided theme.