Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/4=146
M:4/4
K:Amin
['Bc (3e^dc (3edc (3cBA', 'Bc (3e^dc (3edc (3cBA']  
X:1
L:1/8
Q:1/4=146
M:4/4
K:Amin
|: e ^de | fe dc"E" B4- | B4 z d ^cd | ed cB"Am" c4- | c4 z A ce | a^g =g=f =fe^dc | 
"Cdim" _e4"Dm" d3 c | Bc (3e^dc (3edc (3cBA |"Am" e4 z A ce | a^g =g=f =fe^dc | 
"Cdim" _e4"Dm" d3 c | Bc (3e^dc (3edc (3cBA |"Am" A4 z :: e ^de |"Dm" f3 d B3 f |"Am" e3 c A4 | 
"E" Bc (3e^dc (3edc (3cBA |"Am" e4 z e ^de |"Dm" f3 d B2 z f |"Am" a4- a4 | g z f z e z d z |1 
 cB e^G"Am" A :|2 cBe^G"Am" A z3 |:"C" (3cBc (3e^de (3g^fg c'2 | (3c'ba (3gfe dc e2 |1 
"G" ^fg (3_bag (3bag (3fed |"C" g4 fe g2 :|2"E" Bc (3e^dc (3edc (3cBA |"Am" A4- A4 | z |: ^fga | 
 _ba g^f _ed cB | e4- e4 | Bc (3e^dc (3edc (3cBA |1"Am" e4 z :|2 A4 z |]  