This is a popular Robin Ford blues shuffle....hold the pick between
your index and thumb, use the pick and your middle finger
4 Times (I)
e--------------------------------
B--------------------------------
G-----------4---2--1--------------
D--------------------------------
A--2-2------5---4--2--------------
E--0-0-3-4----0------------------
2 times (IV)
e----------5---3--2----------------
B--------------------------------
G----------5---4--2----------------
D-2-2--------0----------------------
A-0-0-3-4----------------------------
E--------------------------------
Back to (I twice)then;
2 times (V)
e--------------------------------
B-----------7----5--5---------------
G--------------------------------
D--4-4------7----6--5-----------------
A--2-2-5-6---------------------------
E--------------7------------------
Back to (IV twice) then (I twice) then the turnaround
e-----2-----
B-----0-----
G-----2-----
D-----1-----
A-0-1-2-----
E-----------
Then start the progression over again