“Diabelli - 12 First Lessons - Op. 125, No. 2” is a short beginner Classical piano piece in C major. The music is marked Allegretto and uses a simple melody above steady left-hand quarter notes. The piece is only 16 measures long, but it introduces important early skills: smooth legato phrasing, basic hand coordination, dynamic contrast between piano and forte, and a clear repeated-section form.

Measures 1–8 present the first section. The right hand plays a very simple melody made mostly of long notes, while the left hand moves in steady quarter notes underneath. The opening piano dynamic keeps the sound gentle, and the change to forte in measure 5 gives the second phrase a stronger answer before the repeat sign.

Measures 9–16 present the second section and close the piece. The right hand now uses simple two-note chords, while the left hand continues the same steady quarter-note accompaniment. The final crescendo beginning in measure 13 builds toward the last cadence, giving the short lesson a clear and confident ending.

Interesting fact: Diabelli’s Op. 125 is titled 12 First Lessons, and pieces like this were written to give beginners real musical phrasing while keeping the notes very simple. No. 2 is useful because it lets students practice legato melody, left-hand steadiness, and dynamic control without a complicated texture.