Em:
A section

| Em Bm7 | Em Bm7 |

riff to chords
1 3 5 5571

riff to key

1 3 5 2 4 5

1 3 5 2 2 4 5

variations:

dw
(to chord)

Em Bm
1 5 3 1 5 3 1 3

pn
Em Bm
1135 1135

B section

||: Em | Bm7 | Cmaj7 | B7 :||

| 1 2 333 321 3 | 222 1 7 2 | 111 7 6 1 121 | nat7 1 2 4 |

| 555 43 5 4 3 | 444 3 2 4 4 | 333 2 1 3 2321 | nat7 1 2 5432 |

variations

1. horizontal to key, using ear

2. combine horizontal & vertical using scale & arpeggios (might take more time, and might even be more interesting, but also might be less melodic)

3.analyze chord tones of each chord to key

||: Em | Bm | Cmaj7 | B7 :||

(to chord)
1 b3 5 1 b3 5 1 3 5 7 1 3 5 b7

(to key)
1 3 5 5 7 2 6 1 3 5 5 nat7 2 4

5 7 1 nat7

C section

| Em | % | % | B7 |

1 || 5 4 3 4 5 6 5 1 | 5 4 3 4 5 6 5 1 |

| 6 5 4 3 4 3 2 1 | 2 ||

A section