Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:6/8
K:Bmin
['B3 bfd Bdf ecA B3', 'FBB BAB cBc Ace a^gf ecA']  
X:1
L:1/8
M:6/8
K:Bmin
 B3 bfd | Bdf ecA | B3 baf | g3 fdc | B3 bfd | Bdf ecA | B3 cde | dfa ecA :: FBB BAB | cBc Ace | 
 a^gf ecA | cBc BAE | FBB BAB | cBc Ace | a^gf ecA | cBA B2 A :|  