Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
Q:1/2=80
M:2/2
K:Emin
['B2 AB cBAG F2', 'g2 fe']  
X:1
L:1/8
Q:1/2=80
M:2/2
K:Emin
 G>F | E2 B>c B2 AB | cBAG F2 G>F | E2 e>f g2 fe | ^d>ef>d B2 AB | cBAG F2 GA | 
"^NB" B>GF>E{e} ^d2 ef | gef^d eBAB | G2 F2{EF} E2 :: B2 |"^NB" eB(ef) g2 fe | b>ag>a{g} f2 e^d | 
 eBef g2 fe | bagb{g} f2 AB | cBAG F2 GA | BGFE{e} ^d2 ef | gef^d eBAB | G2 F2{FG} E2 :|  