Craft a musical work adhering to the specified theme and structure.
X:1
L:1/8
M:3/8
K:G
['c2 B', 'G A B c2 B G A2'  
X:1
L:1/8
M:3/8
K:G
|: G A B | c2 B | A d2 | c2 B | G A B | c2 B | A d2 | A3 :: G A B | c2 B | G A2 | G2 F | G A B | 
 c2 B | G A2 | G3 :|  