I would say Mehndi art is mostly expressed with lines. Curvy and straight lines are commonly used to link the pattern together! These designs are often repetitive to form unity throughout the entire design. For example, a mehndi design of a flower will have the same pattern in each petal to show unity. I'd say the entire concept of Mehndi art relies on pattern and repetition!
"Jolene" by Dolly Parton. "Friends in Low Places" by Garth Brooks. "Choices" by George Jones. "Concrete Angel" by Martina McBride. "Kiss an Angel Good Morning" Charley Pride.