need jingle introduction and transition

for a brand, i'm lookin to create a sound identity for when the logo appears and for each transitions in their videos.
the brand is an association, helping to treat cancer in a region of France
the sounds will be for the intro / outro and transition.
can you please tell me how you usually proceed, and how many example you send before choosing one?
the right must be fro all support and all diffusion france and worldwide