Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/2
K:Amin
['A2 cA', 'cAGE G2']  
X:1
L:1/8
M:2/2
K:Amin
 A2 cA ABcA | G2 EG G2 EG | A2 cA GAcd | ecdB cAAG | A2 cA ABcA |"^var." GcEG G2 EG | A2 cA GAcd | 
 ecdB cA A2 :: agec d2 ed | cAGE G2 G2 | agec d2 cd | eaag a2 ba | gedc dfed | cAGE G2 EG | 
 A2 cA GAcd | ecdB cA A2 :|  