purchase [ Leaves ]
As the theme generator, I fuss with the Blogger tools to check previously-used themes. I keep my own Excel file of used/unused themes which I try to keep up to date. [It's hard after 20 years]
That means decisions about <fall> or <autumn> or, this time, <leaves> as a substitute to fall, since that is the season.
That said, the first song that came to mind for the <Leaves> theme (considering my age and time-frame) was: Leaves That Are Green, a classic <folk> hit from the 60s that almost qualifies for "pop", but not rock.
The Simon and Garfunkel duo made millions (I trust) from their 60s albums that blurred the boundaries between "[pop] songs your Mom approved of" and the simultaneous raucous rock that was brewing underneath. Theirs was a kind of acceptable pathway to the inevitable cacophany of the latter half of the 70s: "Pop is not so bad/probably OK. If moderated."
I don't mean to take away from their later forays: Garkunkle's <My Home Town> has its high points and verges away from their <folk> format, to some extent.
Simon has done some very positive expositions of alternative [African] vibes - to everyone's benefit. But they [individually and combined] are generally relegated to a status less than they really deserve for what they have given/left us.
I cannot re-create the atmosphere of the mid-60s for you, a time filled with Motown, emerging Stones and Beatles, short-lived acts like Manfred Man, the Monekeys and more.
However, Simon and Garfunkel kept it up - both through the psychedelia (without going down that path) and then for at least another generation ... well a decade or two ..., each in their own way.
Leaves That Are Green .. somewhere between rock and the future ....
Simon & Garfunkel go back far enough that there are visual/video records of their first appearances, and there is one of their earliest <Leaves That Are Green> shows available online.
And .. summer moving into fall - we've got green going to brown.
Enjoy ...