Thillana is a format of Bharatanatyam, a classical dance form that originated in Tamil Nadu, India. It is a vibrant and rhythmic dance that is performed at the end of a Bharatanatyam recital. Thillana is a pure dance form that focuses on the use of intricate footwork and rhythmic movements.

The word 'Thillana' is derived from the Sanskrit word 'Thillai', which refers to the Thillai Nataraja Temple in Chidambaram. The Thillana is typically performed to fast-paced music, which is usually in the Carnatic music style. The music for Thillana is characterized by repetitive, fast-paced rhythms that are designed to showcase the dancer's skill and agility.

Thillana is a high-energy dance form that requires a lot of physical strength and stamina. The dancer must be able to execute complex footwork and intricate hand gestures with precision and grace. The dance form also requires the dancer to be able to maintain perfect timing and rhythm throughout the performance.

Thillana is known for its vibrant and colorful costumes, which often feature bright colors and intricate designs. The dancer's attire typically includes a flowing skirt or sari, along with jewelry and other accessories that help to accentuate the movements of the dance.

In conclusion, Thillana is a format of Bharatanatyam, a classical dance form that originated in Tamil Nadu, India. It is a pure dance form that focuses on the use of intricate footwork and rhythmic movements, and is typically performed at the end of a Bharatanatyam recital. Thillana is known for its fast-paced music, vibrant costumes, and high-energy movements, and requires a lot of skill and precision to perform.