Craft a musical work adhering to the specified theme and structure.
X:1
L:1/8
Q:1/2=80
M:4/4
K:C
['c3 d', 'ef gfga'  
X:1
L:1/8
Q:1/2=80
M:4/4
K:C
 GA | c3 d cded | c2 A4 GA | c3 d cdec | f2 d2- d2 cA | c3 d cded | c2 A2 A2 c2 | G3 A GAcd | 
 e2 d2- d2 || ef | gfga gede | c2 A2- A2 ef | gfga gedc | e2 d2- d2 ef | gfga gede | c2 A2 A2 c2 | 
 G3 A GAcd | e2 d2- d2 |]  