Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:C
['BAG FDD D2 E FAF EDE', 'Bdd Bdd']  
X:1
L:1/8
M:6/8
K:C
 |[K:D] F Fdde Favue b e ueBcd BAG | FDD D2 E | FAF EDE | FEE E2 A | Bcd BAG | FDD D2 E | FAF EDE | 
 FDD D3 :| Bdd Bdd | Bdd dBA | Bee Bee | Bee eBA | Bdd Bdd | Bdd dBA | Bcd BAG | FDD D3 :|  