On the original cut, Otis, armed with a Gibson ES-335, a Fender Super Reverb, and two tracks of analog tape, stacked a higher part (similar to Guitar 2 below) atop a lower part (similar to Guitar 1) to generate a mesmerizing harmonic progression composed of shimmering sixteenth-note triplet phrases. Each phrase sounds four times per measure. (Notice that the second pulse of each six-note grouping is a rest.)
If you can play either part separately, generating the two-part composite lick (highly recommended!) is easy if you have a looper or, even better, a multi-track recorder. (Mixing tip: To make the repeating four-bar phrase even more epic sounding, take inspiration from Otis and gradually add trippy effects such as flange or phase shifting to the entire mix as you slowly pull back the master fader.)