“Hello Goodbye”song,How McCartney wrote?

Alistair Taylor, who worked for the Beatles' manager, Brian Epstein, had asked McCartney how he wrote his songs, and McCartney took him into his dining room to give him a demonstration on his harmonium. He asked Taylor to shout the opposite of whatever he sang as he played the instrumentblack and white, yes and no, stop and go, hello and goodbye. Taylor later said, “I wonder whether Paul really made up that song as he went along or whether it was running through his head already.”

Under the working title “Hello Hello”, the Beatles recorded the backing track on 2 October 1967, and added vocals and a guitar overdub on the 19th. After further overdubs of bass guitar and viola, recording was completed on the 2nd November, and mixing on the 6th.5 “Hello Goodbye” is in the key of C Major and in 4/4 time.