Develop a musical composition by utilizing the given alphabetic notation and supplied motif.
X:1
L:1/8
M:2/2
K:Bmin
['f2 Bf', 'B A FBBc dBcA EAAB cdec |1']  
X:1
L:1/8
M:2/2
K:Bmin
 g | f2 Bf dBfB | f/^g/a ef cAec | f2 Bf dBfd | ecac B/B/B B :: A | FBBc dBcA | EAAB cdec |1 
 FBBc dBdb | afec B/B/B B :|2 dBdb cAce | dfec B/B/B B ||  