Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/16
M:2/4
K:G
['B,C D2B2 B2>^A2 B4 BAGF E2c2 c2B2']  
X:1
L:1/16
M:2/4
K:G
 B,C |"G" D2B2 B2>^A2 |"G" B4 BAGF |"C" E2c2 c2B2 |"C" c4- cgeg |"D7" d4 ^c2d2 |"D7" e2ee d2^c2 | 
"G" d4- d^cd=c |"G" B4 BABc |"G" d2B2 G2B2 |"G" d2g2- gagd |"C" efed cBAG |"A7" E2G2 F2E2 | 
"D7" D2D2 F2A2 |"D7" e2d2 cAFG |"D7" A2[GB]2- [GB]2[GB][GB] |"G" [GB]4 z2 |]  