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:Ador
['GAB<G AAAB edef gedB A>A A', 'e>f gedB GABG']  
X:1
L:1/8
M:4/4
K:Ador
 a | A>AAB e2 d<B |1 e2 d<B GAB<G | AAAB edef | gedB A>A A :|2 e2 d<e GAB<G | AAAB edef | 
 gedB A>A A || B | Aaag a2 e>f | gedB GABG | Aaag a2 e>a | gedB AAAB | Aaag a2 e>f | gedB GABG | 
 AAAB edef | gedB A2 A ||  