Let’s do a little discussion on half-step and whole step movement in music.
Half-step is the smallest interval in western musical scale.
To get the half step from any note, just move up or down to the next note.
Eg. A half step upward from C is C#.
A half step upward from G is G#.
A half step downward from G is Gb [note I said Gb and not F# because moving downward is flat and going upward is sharp].
A whole-step is just twice of half step. This means twice of half-steps is equivalent to one whole-step.
A whole step upward from C is D because C~C# is a half-step while C#~D is also a half-step.
C~D becomes a whole-step equivalent to two half-steps[C~C#
A whole-step upward from F is G
A whole-step upward from A is B
A whole-step downward from E is D.
A whole-step downward from F is Eb.
Provides the Half-step downward notes from
Provide the whole-step upward notes from