Rondo

The rondo is a musical form that contains a principal theme (sometimes called the "refrain") which alternates with one or more contrasting themes, generally called "episodes", but also occasionally referred to as "digressions" or "couplets". Some possible patterns include: ABACA, ABACAB, ABACBA, or ABACABA.
The rondo form emerged in the Baroque period and became increasingly popular during the Classical period. The earliest examples of compositions employing rondo form are found within Italian opera arias and choruses of the... meer