@MattL already pointed out the three chord pattern.
With Roman numerals the basic harmonic template is
v VI i. That's a minor
v. The chords are diatonic, but technically non-functional. I only mention this as a kind of progression. When chords are treated non-functionally you can use unconventional root progressions that aren't like familiar patterns such as
ii V I, and they can sound pretty cool with a more drifting feel.
Then a harmonic pattern is repeat by transposing you can call it a harmonic sequence. Sequences can be either diatonic or chromatic. In this case the sequence is chromatic and shifts into different modes.
Instead of having a more common name like turnaround
ii V I or substitution
ii bII I you could call this kind of progression...
A diatonic, non-functional, sequential progression.
That is a mouthful, but it really does describe the kind of progression.