Compose a piece of music following the specified structure and theme.
X:1
L:1/8
M:4/4
K:G
['', '(3BBB DG BB dB'  
X:1
L:1/8
M:4/4
K:G
 d2 c2 |: (3BBB DG BB dB | (3ccc EA cc ed | (3BBB DG BB dB | AG FE D2 dc | (3BBB DG BB dB | 
 (3ccc EA cc ed | de fe dc BA | (3GBd (3gdB G2 dc ::  