Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/8
M:6/8
K:Bb
['B,2 B', 'C3 cAF ecA dBF fdB cde dcB']  
X:1
L:1/8
M:6/8
K:Bb
|: B,2 B B,2 B | GEC FDB, | B,2 B B,2 B | fdB AGF | Gce FBd | GcB AGF | GED CBA | B3 C3 :: 
 cAF ecA | dBF fdB | cde dcB | AcA F2 E | DFB EGc | FBd Gce | fdB AFA | B3 B,3 :|  