Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:6/8
K:Bmin
['E3 EFA', 'fec A3 e z a aba fed'  
X:1
L:1/8
M:6/8
K:Bmin
|: B3 BAF | ABc BAF | E3 EFA | E3 EFA | d2 e f2 a | baf afe | fed e2 d |1 fed cBA :|2 fed cBc |: 
 d3 f z a | afe fec | A3 e z a | aba fed |1 G3 d z e | fed edc | A3 eAf | gfe fec :|2 B3 dBe | 
 fed cBA | G3 def | afe fec | d2 ||  