Foxy Trot is one original tune in C, and this post teaches it three times over the same six bars. The title is the dance: the ballroom foxtrot's slow-quick-quick, squeezed down into a single palm-muted beat.
The harmonic spine never moves — C5 – F5 – A♭5 – G5, or I – IV – ♭VI – V in C, six bars inside the repeats and then home to a held C at ♩ = 120. What changes is the job the guitar is doing. Thread 1 is the groove, Thread 2 is the melody, Thread 3 is the harmony hiding inside the power chords — three parts of one arrangement, not three unrelated exercises. The A♭ is the tune's one dark turn, borrowed from C minor, and most of the swagger comes from it.
The rhythm cell that names the tune — one eighth plus two sixteenths per beat, counted "1 & a," picked D-D-U and palm-muted the whole way — driven through the full progression. The most accessible of the three.
The same tune as an octave melody on the A and G strings, using the power chord with the 5th lifted off. The notes aren't the hard part. The muting is.
A single-note line that hands every power chord the 3rd it doesn't have, then flips one note as the ♭VI gives way to the V and pulls the tune home to C. The most demanding part of the week.
Work them in order if you want the groove under your hands first — either way they're the same six bars, and they stack into one piece of music.