Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/8=120
M:2/4
K:D
['ef/e/ dB BA']  
X:1
L:1/8
Q:1/8=120
M:2/4
K:D
"Em" ef/e/ dB | BA B/c/d | ef/e/ dB |"D" BA A2 |"Em" ef/e/ dB | BA B/c/d |"D" af/a/"G" gc |1 
"A" ed"D" d2 :|2"A" ed"D" de"D"f>e fA | B/c/d ef |"G" g>f ga | ba f/g/a |"D" f>e fA | B/c/d ef | 
 af/a/"G" gc ||1"A" ed"D" de :|2"A" ed"D" d2 |]  