<human>:  How do you play the blues on a guitar?
<bot>: To play the blues on a guitar, you'll want to start by mastering basic chords and simple blues riffs. You can also add bends, slides and vibrato to blues riffs to give them a more authentic sound. Additionally, you will want to use specific scales such as the major blues scale or the minor blues scale. Finally, an understanding of musical phrasing, understanding of the blues form, and improvisation skills are essential for playing the blues on a guitar.