Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:6/8
K:A
['A |{A}']  
X:1
L:1/8
M:6/8
K:A
 A>AA A2 A |{A} BAB{AB} c2 A | f>ff{f} e2 c |{d} c>BA{Ac} B3 | A>AA A2 A |{A} BAB{AB} c2 A | 
 f>ff{f} e2 c |{d} c>BA{e} A2 |] A |{g} a2 A{ef} e2 A |{A} fAf{f} e2 A |{A} a2 A{A} e2 A | 
{cd} c>BA{Ac} B2 A |{g} a2 A e2 A |{A} fAf{f} e2 e | f<af{f} e2 c | eBe{e} A2 |]  