Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/8
M:6/8
K:Bb
['B2 F']  
X:1
L:1/8
M:6/8
K:Bb
 F | B2 F d2 B | A2 c e2 c | Bfdcge | d3 c2 f | edcBAG | FGA B2 c | d3 d=ef | F3 G2 F | F4 z F | 
 e2 cAcF | f3- f2 e | dcBBcA | B3- B2 F | c2 c c2 d | e2 d c2 f | f2 BBcA | B4 z |]  