Rondo always comes back to its theme.
Its structure is very much like opera. In part one, themes are introduced. In part two, the exposition, they are changed. Part three combines the themes once more, but changed, different. Finally, a coda, to round it off, to signify the end.
Mozart did not "write" music, he "copied" it from his head. He wrote the scores completely, no abbreviation.
"I write music like horses piss", he said. Originally (one of his) name was "Gottlieb", but since he was a wonderchild, a prodigy, they used the Latin version, "Amadeus".
