Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/4
M:4/4
K:G
['D G/G/', 'B3/2 A/ G/A/ B'  
X:1
L:1/4
M:4/4
K:G
 D G/G/ D G/G/ | F E F E | D G/G/ D G/G/ | F G A2 | D G/G/ D G/G/ | F E F E | D D E F | G G G2 || 
 B3/2 A/ G/A/ B | c2 A2 | B3/2 A/ G/A/ B | A F D2 | B3/2 A/ G/A/ B | c2 A2 | G G F/E/ F | G G G2 :|  