Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/16
M:2/4
K:G
['', 'gedc BGBd a2a2', 'BGG2 G,2>A2 cBAG'  
X:1
L:1/16
M:2/4
K:G
 G2 |: gga2 gga2 | gedc BGBd | a2a2 a2ab | aged BGDD | Bg2B g2ga | gedc BGBd | a2a2 abaf |1 
 gfed BGG2 :|2 gfed BGGG, |: d2Bd cBAd | Bcd^c BGG2 | G,2>A2 cBAG | FGAd BGG2 | G,2>A2 cBAG | 
 ABd^c BGGB | d2Bd cBAF | DFAd BGG2 :|  