Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:6/8
K:D
['Fdc cBA GAB']  
X:1
L:1/8
M:6/8
K:D
 D | Fdc cBA | GAB ADE | FGB AGF | EFG FED | Fdc cBA | GAB AdD | FGB AGF | EDC D2 A | BBB Bcd | 
 cAF AEF | GGG GAB | FGA EDE | Fdc cBA | GAB AdD | FGB AGF | EDC D3 ||  