Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
Q:1/4=120
M:4/4
K:Dmin
['D2 (DE) FGAF', '(da)fg (af)df']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:Dmin
"^Reel." F | D2 (DE) FGAF | EcGc ECCE | D2 (DE) FGAF | Ddfe d3 :: f | (da)fg (af)df | egcg ecge |1 
 (da)fg (af)df | ecge d3 :|2 fde^c defd | =cAGE{FE} D3 |]  