Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
Q:3/8=120
M:6/8
K:Bb
['B FDE F2', 'B,2 f fdB fg_a |{_a} g2 g']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:Bb
 B | FDE F2 B | FDE F2 B | cec BdB | cAF"^tr" F2 B | FDE F2 B | FDE F2 f/e/ | dcB FBA | BFD B,2 :: 
 f | fdB fg_a |{_a} g3-"^tr" g2 g | g=ec egb |{b} a3- a2 g | fbf dfd | ege cfc | dcB FBA | 
 BFD B,2 :|  