Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/4
M:2/4
K:C
['G3/2 G/ G A c d e2']  
X:1
L:1/4
M:2/4
K:C
 G3/2 G/ | G A | c d | e2 | f e/d/ | e d | c A | G2 | |]  