Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:2/4
K:F
['dcdg fd c2 ddfA G2 G2 A>cdd']  
X:1
L:1/8
M:2/4
K:F
 dcdg | fd c2 | ddfA | G2 G2 | A>cdd | cA G2 | AAcE | D4 |]  