Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:6/8
K:E
['fge c3 BcB B2 G B2']  
X:1
L:1/8
M:6/8
K:E
|:"E" Bee gBB | fBB gBB |"F#m" cff f2 e |"B" fge c3 |"E" BcB B2 G |"C#m" B2 c e2 f |1 
"F#m" g2 b gfe |"B" [Bf]3- [Bf]GA :|2"A" gbg"B7" fec |"E" e3- e2 g |:"G#m" b3 gbb |"E7" fbb efg | 
"A" (g a2) gag |"F#m" fge c3 |"E" BcB B2 G |"C#m" B2 A e2 f |1"F#m" g2 b gfe |"B" [Bf]3- [Bf]ga :|2 
"A" gbg"B7" fec |"E" [Be]3- [Be]2 z :|  