If you start
playing from the note G, and play eight notes, that
is the scale of G major.
G
A
B
C
D
E
F sharp G
Click the play arrow twice.
At the beginning of this, you will see the key signaturewith one sharp,
indicating that in this piece of music all the F notes are sharps. Instead
of the white note F, you play the black note F sharp.
On this keyboard, the F sharps are indicated. The F sharp is just to the
right of the note F.
So the scale of G goes G, A, B, C, D, E, F sharp, G.