Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/4
K:D
['A d2 ec d2 B>c dB AG']  
X:1
L:1/8
M:2/4
K:D
 A | d2 ec | d2 B>c | dB AG |{G} F2 Ac | BG Bd | cA z d | c>d eE | AA z A/A/ | d>e fd | B2 ef | 
 (gf) ed |{d} c2 bc | d A2 d/>e/ | f2 ed | e c2 (e/>f/) | g2 fg | a2 fd | BG z B | A2 c d d2 |]  