Answer:
The C major scale is the only major scale with zero sharps or flats; therefore, no key signature is necessary at all.
A comics even though these are old but there is some that are still being made today it gives you a visual and reading about what who where and why is happening.
....... Pretty Much all of them, but being a virtuoso pianist himself, your best bet would be Ludwig van Beethoven
I believe it is a positive shape, but I could be wrong
