"Half Time" is a cool little half-time shuffle in the key of Bb. The progression consists of F9 - F/Bb - Ebma7, a V - V/I - IV progression that is rooted squarely in F Mixolydian. This saucy little number pushes along nicely with lots of space to let melody notes breathe. Add the 13th to the F9 chord like I've done here to add an extra flavor. Try F Mixolydian (Bb major scale) for solos and also G minor and C minor pentatonics...Yum!