Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/4
M:4/4
K:C
['F G4- G']  
X:1
L:1/4
M:4/4
K:C
 z C F/F/ A | c4- | c d/c/ A F | A4- | A F F A | c4- | c (d/c/) A F | G4- | G C/C/ D F | G4- | 
 G A/G/ F D | F4- | F C/C/ D F | G4- | G A/G/ F D | F4- | F z3 |]  