2.1The major-scale formula

A major scale follows this pattern:

whole – whole – half – whole – whole – whole – half

Using semitone counts:

2 – 2 – 1 – 2 – 2 – 2 – 1

In Russian terms:

тон – тон – полутон – тон – тон – тон – полутон

Start from C:

C → D = whole D → E = whole E → F = half F → G = whole G → A = whole A → B = whole B → C = half

So:

C major = C D E F G A B C

= до ре ми фа соль ля си до

No black keys are needed because C major happens to fit the white keys exactly.