Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
Q:1/8=160
M:4/4
K:Bb
['fe dbfd BfdB FdBF D2 EF', 'g2 g2']  
X:1
L:1/8
Q:1/8=160
M:4/4
K:Bb
 fe | dbfd BfdB | FdBF D2 EF | GABc decB | A2 F2 F2 fe | dbfd BfdB | FdBF D2 EF | GABG FGFE | 
 D2 B,2 B,2 :: DE | FBdB FBdB | Gcec Gcec | dfga bag^f | g2 g2 g2 ab | fbfd BfdB | FdBF D2 EF | 
 GABG FGFE | D2 B,2 B,2 :|  