The second side of Pink Floyd’s 1970 album, Atom Heart Mother, had three individual songs by the three main writers. Roger Waters’ contribution was If.
It is a very simple chord progression played with an eight-note arpeggio fingerpicking pattern. The lesson is done ‘Work It Out’ style showing you only the right hand at first, then giving a few hints before revealing the chord progression and arrangement.
There are no attachments with the lesson as they should not really be necessary.