"Shine On You Crazy Diamond" is a nine-part composition by the English rock band #PinkFloyd for their 1975 album #WishYouWereHere. It was written by #DavidGilmour, #RogerWaters, and #RichardWright, and first performed on Pink Floyd's #1974FrenchTour. The song is written about the Pink Floyd founder member #SydBarrett, who left in 1968 following mental health problems.
https://www.youtube.com/watch?v=Tu7oq3VNgpY