Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
M:2/4
K:G
['G2 A>B cA', 'fd d>e'  
X:1
L:1/8
M:2/4
K:G
|: D/ | G2 AB | cA dB | G2 A>B | cA FD | G2 A>B | cA d>e | fd cA | BG G3/2 :: d/ | g2 ag | fd de | 
 fd d>e | fe fd | g2 a>g | fd d>e | fd cA | BG G3/2 :|  