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<GBc dedB', 'g>age dedB'  
X:1
L:1/8
M:4/4
K:G
 B || G<GBc dedB | G<GBc d3 B | G<GBc dedB | A<ABd e3 g | G<GBc dedB | G<GBc d3 B | G<GBc dedB | 
 A<ABd e3 f || g>age dedB | g>age fgab | g>age dedB | A<ABd e3 f | g>age dedB | g>age fgab | 
 g>age dedB | A<ABd e3 g ||  