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:Gmin
['d d']  
X:1
L:1/8
M:2/4
K:Gmin
 F | B2 c2 | d3 d | d d d c | e2 !fermata!d2- | d3 c | c2 d2 | !fermata!B3 d | d c B c | (BA) G2- | 
 !fermata!G4 |]  