Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:G
['d d2 c B2']  
X:1
L:1/8
M:6/8
K:G
 B | B>BB B2 B | cc z3 A | A2 d d2 c | B2 z d3 | B>BBBcd | e3 edc | d2 d d2 c | B2 z d3 | B>BBBcd | 
 e3 edc | d2 d d2 c | B2 z3 |]  