Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:3/4
K:Emin
['B3 e', 'B2 e2']  
X:1
L:1/8
M:3/4
K:Emin
 B3 e BA | G2 E2 G>A | B3 e (3BAG | A6 | G>A B>c d>B | A>E A2 B>A | G3 A =F>G | E6 :: g3 f e2 | 
 f2 B2 B2 | e2 d3 c | B6 | c>B A>c B>A |1 B2 e2 e>f | g3 e a>g | f6 :|2 B2 E2 E>F | G3 A =F>G | 
 E6 |]  