Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:6/8
K:Emin
['B,EF GAB', 'BBB cBB']  
X:1
L:1/8
M:6/8
K:Emin
|: B,EF GAB | cBA GFE | FEF AGF | E2 D2 C2 | B,EF GAB | cef gfe | dBG EDF | AGF E3 :| BBB cBB | 
 d2 c2 B2 | BBB cBB | A2 G2 F2 | GGG AGG | B2 A2 G2 | DEF GAB | A2 G2 F2 | BBB cBB | eBB cBB | 
 AAA BAA | dAA BAA | GGG AGG | cGG AGG | BGF DEF | E6 ||  