Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:A
['E CA,CE A2 (EA) FAEC DB,B,E CA,CE', '(eA) cAeA']  
X:1
L:1/8
M:4/4
K:A
 E | CA,CE A2 (EA) | FAEC DB,B,E | CA,CE FGAB | cfed cAA :: e | c/B/A (eA) cAeA | GEBE dEBE |1 
 (cB/A/) (eA) cAeA | GEdB cAA :|2 cefg aecA | FdcB cAA |]  