Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:4/4
K:G
['G,B,DG BAGB dBGA', 'cB A2 a3'  
X:1
L:1/8
M:4/4
K:G
|: B,A, | G,B,DG BAGB | dBGA BAGB | cdcB AGFG | AGFE D/E/D C/B,/A, | G,B,DG BAGB | dBGA B2 G/A/B | 
 c2 cB AGFE | DGGF G2 :: Bc | dcBd g2 gB | cB A2 a3 g | f3 g f2 ed | edd^c d2 B=c | dcBd gdgd | 
 cB A2 a3 e | fedB cAFD | G/A/G FA G2 :|  