Here is the music sheet for Czardas that accompanies this description:

Csárdás is a well-known virtuosic piece based on traditional Hungarian folk dances. It was composed by Vittorio Monti (1868–1922), an Italian composer and violinist, in 1904. The piece is famous for its contrasting sections, starting with a slow, expressive Lassú section and transitioning into a lively, fast-paced Friss section. Originally written for violin and piano, it has been adapted for various instruments and remains a favorite among musicians for its dramatic tempo changes and passionate melodies.