[2Jedismom]

It's the holes on your whistle. The top circle being the top hole of your whistle. If it's black, that means you have your finger on it. If not, your finger is up. An + under it means the higher octave.

[Overtaxed]

Looks like this:

eebabfgfe

bDEDbcab

EEEDbbagfd

ebagfede

only with larger fonts