Develop a musical composition by incorporating the given alphabetic framework and motif.
X:1
L:1/8
M:4/4
K:Bmin
['B2 fB dBfB', 'bf f2 bafg']  
X:1
L:1/8
M:4/4
K:Bmin
 ^A | B2 fB dBfB | c2 ac cBAc | B2 fB dBfB | cBAc B3 ^A | B2 fB dBfB | c2 ac cBAc | B2 fB dBfB | 
 cBAc B3 || ^a | bf f2 bafg | ac c2 a3 ^a | bf f2 bafg | (3agf ec cBB^a | bf f2 bafg | 
 ac c2 a3 ^a | bgaf gefg | (3agf ec cBAc ||  