Little Prelude in C, BWV 933

The first of the Six Little Preludes, which survive in copies made by Bach's pupils. Two voices in two halves, each repeated. The ornaments (mordents and trills) belong to the line: play them lightly and on the beat.

Source: Mutopia Project no. 1537, typeset by Hajo Dezelski (CC BY-SA 3.0).