Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/4
M:4/4
K:G
['', 'D G B A'  
X:1
L:1/4
M:4/4
K:G
 D |] G B A B | G G D D | G B A D | G3 D | G B A B | G G D D/ E/ | =F G F D | C2 D D | 
 G2 D (E/^F/) | G3 |]  