Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
Q:1/2=60
M:2/2
K:Dmix
['adag ecge']  
X:1
L:1/8
Q:1/2=60
M:2/2
K:Dmix
|: g | adag ecge | adag adag | adag ecge | (e/g/a) Tge d2 d |:  