A cold ref for the left hand which works well on the keyboard or the guitar is a line often associated with Jimmy Reed as well as one of the early pioneers of Rock Chuck Perry (Piano playing).
This ref most likely originated in boons its music extensively. The musical players like Jimmie Rodgers, Edward James, and Freddie Campbell (piano playing).
It is probably adapting in the spirit with this school of music including whose passion is like Charlie Patton (piano playing). So it is likely that you have heard many times in countless forms of rock and rolling stars, some grateful dead as well Guns N’ all a food and all their roots in large park to the blues (piano playing).
When played on the piano, this ref fits same with the boogie style. Or as my old friend Long John Baldry used to say; “BOOGIE WOOGIE” (piano playing).
Okay I just want to point out on something other than C for a change. There is a G there. How a bout the key of A (Demonstration). Or you can certainly play it just as well in C or any other key it is just a measure of intibles that we have talked about before. To work it out in A, you place the fifth finger of your left hand on A (Demonstration) then your second finger on E (Demonstration) just five notes up 1, 2, 3, 4, 5. Then play this two notes together twice (Demonstration) and move your thumb up to F sharp (Demonstration) and play the route note A with the F sharp for another two hits (Demonstration) and back to A and E again (Demonstration). Put A back and forth between the two (Demonstration). Practice this for a while (Demonstration), just keep going. Do not worry of F sharp when playing the rhythm. There is impression in countless practice. Just let it columns breath and enjoy the practice. Always try to let the music breath (piano playing).
Now move up four notes, what we call the four folds. 1, 2, 3, 4 and we have talked about before. And this is D of course, so play the same rhythm D but let us play it not too down, the same (Demonstration). Old relationships know this song. Practice this a little bit (Demonstration). Is it one chord? (Demonstration). You can lap five whole steps 1, 2, 3, 4, 5 to E (Demonstration), back down to the fourth cord D (Demonstration). Let the one cool. Play it again (Demonstration). The five go again if you want to do it eternally (Demonstration). If you feel comfortable with the left you can tap in your foot and step in fourth beats in one rhythm (Demonstration). Counting 1, 2, 3, 4…..1, 2, 3, 4 (Demonstration).
This are called quarter notes because it takes four quarter notes to make up one whole four beat bar. Since four-four time signature or four beats to the bar (Demonstration). Split each speed in a half and you get eight notes twice its beat to the bar (Demonstration). It is quite a triple action till you can recheck your rhythm. Notice I am putting a swing in it gives it shuffle (Demonstration). Keep your hands to warm up it is rough for key of A. This 1, 4, 5 relationships work in any key of course.