Is there anything about why they are constructed the way they are? I do have to work on the how of these things too (that's what implementation is), but I feel it'd help me understand it more if there was a reason a major scale is built 1-1-1/2-1-1-1-1/2. (And why, the 1st, 3rd, and 5th notes in the scale make up a basic major chord)