What about the F major Fugue ? or fourteen Fugues in F Major, is based on a single theme and its transformations. This secondary title, an implicit reference to JS Bach's Art of the Fugue (which never leaves the key of D minor), brazenly inquires of the fate of F Major, the relative major key.
The Subject, whose notes correspond to letters of the word F.U.G.U.E, is based on the German system, which distinguishes between B-flat (B) and B-natural (H). This Subject is generated from the simplicity of a single note and its two neighboring tones (upper then lower), a sort of musical nucleus, which is, in a way, a rather a-musical proposition.
The "Goddess of Coincidence", who played a great role in this work, allowed for the superposition of the Subject with the name of B.A.C.H. (using the same German system). Presented as a whole, it is not impossible that these fugues may have a curious effect on the listener's sense of time !