Craft a musical work adhering to the specified theme and structure.
X:1
L:1/4
M:3/4
K:F
['F G']  
X:1
L:1/4
M:3/4
K:F
 C | F G A | G3/2 A/ G | F E F | C z F | G A B | c2 c | B2 A | G z F | G G c | B A G | F E D | 
 C z C | F/F/F/F/ F | F2 G | A F c/B/ | A2 G | F z |]  