Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:4/4
K:G
['G2 BG', 'dg g2'  
X:1
L:1/8
M:4/4
K:G
 G2 BG DGBG | A2 eg fdcA | G2 BG DGBd | cAFG AGGF | G2 BG DGBG | A2 eg fdcA | GB B2 dB B2 | 
 cAFG AGGF :| B | dg g2 dg g2 | df f2 df f2 | dggf gagf | d^cde fd^cA | dg g2 bgaf | d^cde fefg | 
 afge fde^c | d2 (3efg fdcA :|  