Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:4/4
K:F
['F F']  
X:1
L:1/8
M:4/4
K:F
 C | F F F F | E D C C | F G A F | B A G F | G3 G | A F F A | c3 B | A (A G) F | G3 G | 
 A c A/G/ F | G3 F | B A F x |]  