Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:4/4
K:Edor
['BE E2', '(3Bcd ef g2 fe']  
X:1
L:1/8
M:4/4
K:Edor
|: BE E2 BAFB | ABde fded | BE E2 BAFA | BGAF E2 FA | B3 d BAFB | ABde fded | BE E2 BAFA | 
 BGAF E2 FA :: (3Bcd ef g2 fe | dB B2 dBAd | (3Bcd ef g2 fe | dBAF E4 | fg g2 agfe | gf f2 gfed | 
 BABd efde | ddBA FE E2 :|  