Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:C
['A2 D', 'd2 d ecA']  
X:1
L:1/8
M:4/4
K:C
[M:6/8][K:G] c !>!eve acua ae g b ucec ue!p! eda e f !>!.Meve[Q:1/8=170]"^D modal" .B | A2 D F2 D | 
 A2 D ABc | G2 C E2 C | G2 C EFG | A2 D F2 D | A2 D ABc | G2 E c2 E | DED D2 :| A | d2 d ecA | 
 d2 d ecA | c2 c BcB | c3 A2 c | BdB AcA | GBG FAF | EGE ecE | DED D2 :|  