Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
Q:1/4=120
M:6/8
K:Bb
['edc dBG FGB', 'B2 e def f2 f g>fe fdB']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:Bb
"^Slow." F | F>GA B>cd | e>gf edc | dBG FGB | d>ec B2 F | FGA Bcd | egf edc | dBG FGB | d>ec B2 :: 
 e | def f2 f | g>fe fdB | def gab | B>cB BGF | ege dfd | c>Bc dBG | BAG Ffe | d>ec B2 :|  