Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/4
M:4/4
K:G
['d d']  
X:1
L:1/4
M:4/4
K:G
 G | B3/2 A/ G G | d3/2 d/ d d | B2 G A | G2 G G | B3/2 A/ G G | d2 d d | e3/2 d/ c e | d3 d | 
 g3/2 g/ g e | d d B A | G3/2 G/ B d | B3 A | G2 B B | d2 d d | B B G A | G2 |]  