Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:6/8
K:G
['gdB G3', 'D3 dfa afd afd B3 agf edc']  
X:1
L:1/8
M:6/8
K:G
 gdB G3 | gdB G3 | gfe dcB | cBA G3 | DFA d3 | DFA d3 | d^cB AGF | GFE D3 :: dfa afd | afd B3 | 
 agf edc | c3 B3 | dBG ecA | fdf g3 | ege faf | g3 G3 :|  