How is the idea of the spinning wheel communicated in Schubert's 'Gretchen am Spinnrade'?

Firstly, Schubert emulates the spinning wheel through his use of incessant semiquaver motion in the right hand of the piano accompaniment. The pattern opens the piece and recurs throughout, with the initial figuration outlining the tonic chord of D minor and oscillating around the third scale degree. This oscillation in pitch emulates the circular motion of the spinning wheel. Schubert also communicates the imagery of the spinning wheel through his use of rondo form since the A section recurs throughout the piece, interspersed with other material. This draws on the obsessive nature of Goethe's text, and Schubert's decision to set the A section in the same way each time it recurs makes the repetitive nature of Geothe's poem more effective. Overall, the cyclical quality of Schubert's setting emulates the incessant motion of the spinning wheel.