The composition of this nocturne is very didactic
The triangle 3-4-5
The trumpet player gives the grid by his height 3 and width 2.
The triangle 3-4-5 gathers the three musicians' heads.
The duo sax-trumpet is in the circle 2. The bisectors are speaking :
the diagonal of a simple square (in blue) crosses the head of the trumpet. The diagonal of double square (yellow)
comes from the head of an african sculpture and it holds the hand of the saxophonist. The diagonal of the triple square crosses vertically his body
and it comes up to the beak of the celtic bird. The side 3 unifies the two imaginary symbols, african and celtic.
The side 5 is the link between Africa, the double bass, the mouth of the trumpet and the standing foot of the sax - he crosses the side 4 with his other,
which keeps the tempo/equilibrium.