Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
M:4/4
K:Edor
['edde B3 G |1 A3 G FGAc', 'efed Begf efg.a z a2 g fede']  
X:1
L:1/8
M:4/4
K:Edor
|: edde B3 G |1 A3 G FGAc :|2 A2 AG FG A2 |: Begf efd.e | z edf efed | Begf efg.a | z a2 g fede | 
 Begf efd.e | z edf efeB |1 c3 A B3 G | A2 AG FG A2 :|2 c8- | cd (3cBA FGAc ||  