4sided stone pillar with pyramid on top and relief carving on all four sides

the answer is counterpoint.

counterpoint definition: "the art or technique of playing a melody or melodies in conjunction with another, according to fixed rules."

counterpoint is present in a lot of baroque music- such as bach (notably his wtc prelude and fugues) and scarlatti, but can also be found in music by mozart, beethoven. it can even be found in music as modern as john williams!

i think it's about 10 mins.

actually i think that's wrong, but i don't know how to delete this.

but who knows it might be right.