Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
Q:1/2=76
M:2/2
K:Bb
['DFB,F DFB,F DF Bd fd BF', 'B,2 fe dfBf dfBf bagf edcB c=Bcd']  
X:1
L:1/8
Q:1/2=76
M:2/2
K:Bb
 FE | DFB,F DFB,F | DF Bd fd BF | GBAB FBAB | Acec BAGF | DFB,F DFB,F | DF Bd fd BF | Egfe dcBA | 
 BFDF B,2 :: fe | dfBf dfBf | bagf edcB | c=Bcd edef | gecB BAGF | GBFB EBDB | Ccec BAGF | 
 Egfe dABG | FEDC B,2 :|  