One of These Days

This was built around a bass riff Roger Waters played through an echo unit. They worked off that for the rest of the song.

At the time, Pink Floyd was intrigued by minimalist composers who were experimenting with electronic patterns. They used a pattern this type of pattern throughout the song.

Dave Gilmour called this "The most collaborative effort of anything we ever did." In later years, the band didn't collaborate on songs nearly as much.