Classical Music question (specific peice)..?

what classical music peice has the same section of music but just played over and over with different speeds and different instraments?

i need an artist and a song title. and maybe a date when it was made.

(pleas dont fight about classical music and what it's really concidered on here, i just need answers).

Benjamin Britten's Young Person's Guide To The Orchestra is another one.

Maurice Ravel's Bolero (1928)....not really different speeds but it is the same theme played by various combinations of instruments.

Niccolo Paganini's Caprice # 24 for violin ; variations on a single theme. Only played on the violin but played in different ways.

You could also try if you are looking for something 脿 la modern minimal music. Maybe Drumming by Steve Reich or pieces by Glass.
Else: Beni Mora by Gustav Holst is a piece that could answer to your description (apart from those mentioned already).

There are few contenders for this:

Ravel: 'Bol茅ro' (1928)
Shostakovich: Symphony No 7 (Leningrad) - 1st movement (1941)
Wojciech Kilar: Exodus (1981)
Reich: Drumming (1971)
Terry Riley: in C (1964)

These are the examples that pop into my head immediately.

When you learn to write a sentence and to spell and to listen and not use "considered on'" . PEOPLE MIGHT REGARD YOUR QUESTIONS WITH INTEREST.