Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:6/8
K:D
['Add Fdd', 'GAB faa gfe fAA ded BBB dGG']  
X:1
L:1/8
M:6/8
K:D
|: FED Add | Fdd efg | fed Add | Bcd gBB | Add Fdd | edB Adf | age fdd | BdB GAB :: faa gfe | 
 fAA ded | BBB dGG | BGG Add | Fdd edB | Add efg | age fdd | BdB GAB :|  