Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:4/4
K:Emin
['BE E2', 'E2 edBA B2 ef gfed BA (3Bcd']  
X:1
L:1/8
M:4/4
K:Emin
|: EFGA BE E2 | c2 Bc BE E2 | DEFG AD D2 | ADBD A2 GF | EFGA B2 ed | edBG A2 GA | BAGB AF F2 | 
 GEFD E2 E2 :: edBA B2 ef | gfed BA (3Bcd | e3 f g3 e | f3 d e2 ef | (3gfe fd edBA | BGAF GE E2 | 
 BAGB AF F2 | GEFD E4 :|  