This is a mini lesson to the blues style of guitar playin'
Im mainly self taught so if its a lil off then pro advice is encauraged.

Okay!!!

Now I relate notes to numbers (degrees) this is uber important
A blues verse has 12 bars lets break it down.

A standard blues progression is I IV V to be more specific:
four bars of (I)
two bars of (IV) then
two bars of (I)
one bar of (V) then
one bar of (IV)
one bar of (I) then
one bar of (V)

okay!!!!
lets put it in the key of G

A standard blues progression is G C D to be more specific:
four bars of (G)
two bars of (C) then
two bars of (G)
one bar of (D) then
one bar of (C)
one bar of (G) then
one bar of (D)

this is usually done by playin applicable major chords

Next Lesson the dominant VII (7th) note
A.K.A the blues note