Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
M:3/4
K:G
['D2 G>G B>B d>d', "(3Bgb a2 c'2 (3Afa"  
X:1
L:1/8
M:3/4
K:G
 D2 | G>G B>B d>d | db g2 (3Bgb | a2 c'2 (3Afa | (g2 b2) z D2 | G>G B>B d>d | (db) g2 (3Bgb | 
 a2 c'2 (3Afa | [Bg]4 :: (3Bgb | a2 c'2 (3Afa | g2 b2 (3Bgb | a2 c'2 (3Afa | (g2 b) z D2 | 
 G>G B>B d>d | (db) g2 (3Bgb | a2 c'2 (3Afa | [Bg]4 :|  