Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
Q:1/8=180
M:4/4
K:Dmin
['EC C2 DEFG', 'dcAG A2 de'  
X:1
L:1/8
Q:1/8=180
M:4/4
K:Dmin
 dcAG AD D2 | cAGF EC C2 | DEFG Ad d2 | AcGc Adfe | dcAG A2 dc | A2 GF EC C2 | DEFG Addc | 
 A2 GE ED D2 :| dcAG A2 de | f2 df ecA=B | cAGE GAcd | ec c2 eage | dcAG A2 de | fefd ecAG | 
 FEFG Ad d2 | A2 GE ED D2 :|  