Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:9/8
K:Edor
['E2 F G2 A BGE']  
X:1
L:1/8
M:9/8
K:Edor
"Em" E2 F G2 A BGE |"D" D2 E F2 G AFD |"Em" E2 F G2 A BGE |"D" B=cB AGF"Em" E3 :: 
"Em" eBe e2 f gfe |"D" dAd d2 e fed"Em" | eBe e2 f gfe |"D" dcB AGF"Em" E3 :|  