Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:4/4
K:Edor
['B2 BA', 'BE E2']  
X:1
L:1/8
M:4/4
K:Edor
 B2 BA (3Bcd ed | B2 BA BE E2 | B2 BA (3Bcd ef | gefd eeed | B2 BA (3Bcd ed | B2 BA BE E2 | 
 B2 BA (3Bcd ef | gefd e2- e2 || BE E2 GFGE | D2 ED BE E2 | BE E2 GGGA | BcBA BE E2 | BE E2 GFGE | 
 D2 ED BE E2 | BE E2 GGGA | B2 BA BE E2 ||  