Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:4/4
K:G
['(3Bcd eB', 'dggf g3 f dg g2 bgaf'  
X:1
L:1/8
M:4/4
K:G
|: dG G2 d3 G | (3Bcd eB dBAB | cF F2 c3 F | (3Bcd eB dBAB | dG G2 d3 G | (3Bcd eB dBAG | 
 FGAd f3 e | dcAF G2 :: dggf g3 f | dg g2 bgaf | dffe f3 e | defg agfe | dggf g3 f | dg g2 bgaf | 
 d^cde f3 e | dcAF G2 :|  