Here is a simple blues, using 4-measure phrase repetition and a blues scale riff. Perhaps this isn't my most innovative work, but it certainly falls within the jazz tradition. I wonder how many thousands of riff-based blues heads have been recorded over the years. Some of my favorites include "Centerpiece" by Harry "Sweets" Edison, "Pfrancing" by Miles Davis, and "The Blues Walk" by Clifford Brown. What is your favorite riff-based blues head?