Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
Q:1/8=232
M:4/4
K:F
['FA cA']  
X:1
L:1/8
Q:1/8=232
M:4/4
K:F
|: A | F2 FA cA AB | A/B/c FA cA Af | F2 FA cA Ac | df cA G/G/G GA | F2 FA cA AB | A/B/c FA cA Af | 
 F2 FA cA Ac | df cA G/G/G Gg | f/g/a fc d2 df | cf Af cf Af | a/g/f/e/ fc d2 df | cA fd cA Ag | 
 f/g/a fc d2 df | cf Af cf Af | a/g/f/e/ fc d2 df | cA fd cAG :|  