Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:4/4
K:D
['A2 FA', 'Adfd adfd']  
X:1
L:1/8
M:4/4
K:D
 A2 FA DAFA | A2 FA BEEB | A2 FA DAFA | ABde fedB | A2 GA FAEA | DAFA BEEB | A2 FA DAFA | 
 ABde fd d2 || Adfd adfd | Adfd ge e2 | Adfd adfd | ABde fd d2 | Adfd adfd | Adfd ge e2 | 
 fgfe dedB | ABde fedB |]  