Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/16
M:2/4
K:Dmin
['D2 G2G2 G2(AG) F2(FE) D4 E2C2 D2', 'E2(DC) DC=B,C']  
X:1
L:1/16
M:2/4
K:Dmin
"^A" D2 |"Gm" G2G2 G2(AG) |"Dm" F2(FE) D4 |"Dm" F2ED"C" E2C2 |"Dm" D2 D4 :|"^B" |: C=B,C | 
"Dm" D2D2"C" DC=B,C |"Dm" D6 EF |"Gm" G2FE"C" FEDC |"Dm" D4 z :|"^C" |: FG |"F" A2A2 A2(cA) | 
"C" GFG2- G2FG |"F" A6 cA |"C" GFG2-"A7" G2(FE) |"Dm" F2F2 F2(GF) |"C" EDE2- E2(DC) | 
"Bb" D2D2"C" DC=B,C |"Dm" D6 :|  