Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:2/4
K:C
['cB A2']  
X:1
L:1/8
M:2/4
K:C
 c | BA G2 | AB cd |1 cB A :|2 cB A2 | d2 cB | A2 G2 | AB cd | cB A2 | d2 cB | A2 G |]  