What Shall We Do Now?

"What Shall We Do Now?" (working title "Backs to the Wall") is a song by Pink Floyd, written by Roger Waters.

It was originally intended to be on their 1979 album The Wall, and appeared in demo versions of The Wall, but was omitted due to the time restraints of the vinyl format. In its place is a much shorter song, titled "Empty Spaces", which segues directly into "Young Lust". This was a last-minute decision; the album's sleeve notes still feature the song in its track listing, and include its lyrics.