Walking baseline in one of Marty's videos.

On a C root.(8E)           On a F root.(8A)       On a G root. (10A)
E|8-8---------------------------------------------------------------------------|
A|---7-7-8-8-9-9-10-------8-8---------------------10-10-------------------------|
D|-----------------8-10------7-7-8-8-9-9-10------------9-9-10-10-11-11-12-------|
G|-----------------------------------------8-10--------------------------10-12--|
B|------------------------------------------------------------------------------|
E|------------------------------------------------------------------------------|

In the video he plays it C-C-C-C-F-F-C-C-G-F-C, but you can mix it up! Enjoy!