Playing intervals and chords in the C Major Scale

In this lesson, we will continue to limit the discussion to the C Major Chord scale of all naturals, the white keys.  Nevertheless, in playing intervals that start and end just on the white keys, you still have to count the black keys in between them.  Below you see the scale presented as a keyboard where the 2nd line is the interval count from the previous note on the scale.  Five out of 7 times, there is black key in between so the interval count is 2.  The other two times, at the gaps, there is no black key in between so the count is 1.