One phrase becomes a melody
This is the same phrase, repitched.
Play it once at its own pitch, then again a fourth higher, a fifth higher, and an octave up:
phrase: 1 3 5 8 5 3
play at: root · +4th · +5th · +octave # one phrase, four pitches
The phrase itself never changes — it’s one idea. Moving it up in pitch is the only thing that happens, and the four placements climb in key — a fourth, a fifth, an octave home — so the single part rises into a melody.
It’s the sampler’s oldest trick — one sound, played across the keys — except here the “sound” is a whole musical phrase and the keys are the steps of a scale. One idea, reused, becomes the tune.