Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/4
Q:3/4=60
M:3/4
K:G
['c B']  
X:1
L:1/4
Q:3/4=60
M:3/4
K:G
 G/A/ B c | d g g | e/d/ c B |"^sh?" A2 G | D/E/ B- B | D/G/ c- c | B/d/ c B | B A A ::  