Tune your fat E string down to a D, then play an Fmaj7 type shape like this
0x3230 with your little finger on the 3rd fret on the b string then play this riff.



e---------------------------------------------------------------------------
b-----------------3--------------------------------------3------------------
g---------0h2---------2-0--------0-------------0h2----------2-0--------0-2--
d----------------------------3--------3------------------------------3------
a---------------------------------------------------------------------------
D---0--------------------------------------0--------------------------------

e---------------------------------------------------------------------------
b-----------------3---------------------------------------------------------
g---------0h2---------2-0--------0---------0h2-2-0h2p0--------0-----0-------
d----------------------------3--------3--------------------3-----3------3---
a---------------------------------------------------------------------------
D---0----------------------------------------------------------------------0