Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
Q:1/4=150
M:2/4
K:G
['GG/G/ ddBd/c/ cBBAG B2 c2', 'D2 AA/A/ AABBc d2 GG/G/ GGF>E D2']  
X:1
L:1/8
Q:1/4=150
M:2/4
K:G
 GG/G/ | ddBd/c/ | cBBAG | B2 c2 | d D2 :| AA/A/ | AABBc | d2 GG/G/ | GGF>E | D2 GG/G/ | AABc | 
 d2 G2 | dc BA | B>A G2 ||  