This is a fun blues comp. To comp is play accompaniment. Comping is to space chords in some type of pattern for the purpose of providing a backdrop for a soloist.
This blues comp follows a standard blues progression – I-IV-I-I-IV-IV-I-I-V-IV-I-V, where each Roman Numerals gets 4 beats.
Play the bass line separate. Then add the the chords. You have two choices when adding the chords: stab the chords quickly, or figure out how to finger the chords (or parts, most likely the tritone) so that you can hold the chords while playing the bass line. This thing is a finger logic puzzle that can teach our hands quite a bit.
You can also just follow the changes using the full chords, without the bass line.
Download a PDF of this Comp [opens in new window or tab - right click to save].