Ah yes, that.
Anyway, now that you've figured out the home chord, I'd like you to determine how each chord in the first 24 bars functions in the key of B. Note that when I ask for the "function" of a chord, I'm looking for either a roman numeral (with major, minor, or diminished quality) or an ice cream flavor. I realize the descriptions I've given you of chord functions so far are rather unhelpful for actually composing music. For now, I'd like you to get comfortable with analyzing existing music in terms of chord functions before we actually get to composing new music using chord functions as a guide.