"Mona"

This sweeet track is very simple. 

Just going back and forth between D and A for forever. 

[D]Mona she comes in the [A]morning
[D]She brings me a bottle of [A]wine

The bass track is basically D and A,

with a little a walk up to the note at the end of previous bar:

.D.......A.......D.......A ...etc

----------------------------

-----------(7)--------------

-5-----------(7)-5----------

-------7-5-------------7-5--

The one lead up to D, in brackets, appears less frequently.