Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
Q:1/8=128
M:4/4
K:F
['df df']  
X:1
L:1/8
Q:1/8=128
M:4/4
K:F
|: CF FF/G/ AF Ac | CF FG/A/ B/A/G/F/ D2 | CF FF/G/ AF Ac | df cf AG F2 | CF FF/G/ AF Ac | 
 CF FG/A/ B/A/G/F/ D2 | CF FF/G/ AF Ac | df cf AG F2 | df df Af cf | df df df g2 | df df Af cf | 
 df cA B/A/G/F/ D2 | df df Af cf | df df df ga | bg af ge fc | df cA B/A/G/F/ D2 :|  