In Disney's Fantasia 2000, Ludwig van Beethoven wrote the music used for the opening segment, Symphony No. 5.
The segment visualizes the beginning of Beethoven's Fifth Symphony through abstract geometric shapes, including triangular forms that move in response to the famous four-note opening. Beethoven composed the symphony in the early nineteenth century, and the work was first performed publicly in Vienna in 1808. Disney's animation transforms its rhythmic contrasts into a battle between light and dark shapes.
The composer is sometimes confused with the composers featured in other Fantasia 2000 segments. George Gershwin wrote “Rhapsody in Blue,” while Camille Saint-Saëns wrote “The Carnival of the Animals.” The film is a sequel to the 1940 Fantasia, but its opening segment uses Beethoven rather than a piece from the earlier film.