Compose a piece adhering to the given musical structure and theme.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['B3 G ABAG FDAD BDAF DGAF G2', '', 'dgaf g2'  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 z | B3 G ABAG | FDAD BDAF | DGAF G2 eg | fd d2 ABcA | B3 G ABAG | FDAD BDAF | DGAF G2 eg | 
 fdcA BGG :| B |: dgaf g2 ag | fd d2 fdcA | dgaf g2 fg | a2 ga bgfg | bg g2 gbag | fdde f3 g | 
 a2 bg abag | fddc ABcA :|  