It is in a single-part form.

a (measures 1-8) + a1 (measures 9-15) + Coda (measures 16-20)

The key is C major. A motif connecting half notes and quarter notes with a slur expresses the gentle swaying of a rocking chair.

Although the chord in measure 2 is a VI chord, it should be understood as an embellishing chord rather than a functional harmony, and in measures 1-3, it should be considered a melodic shape that essentially sways up and down (G→A→G).

Section 'a' concludes with a half cadence on a dominant seventh chord, and section 'a1' serves as the conclusion of section 'a', beginning with a dominant seventh chord as an imperfect cadence.