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:A
['', 'AA d2 cA d2 eA', 'a2 ae']  
X:1
L:1/8
M:4/4
K:A
 a |: AA d2 cA d2 | eA d2 BBB=G | AA d2 cA d2 | eA B2 AAA=G :| AA^ge a2 ae | g2 gd BBB=G | 
 AA^ge a2 ae | g2 dB AAA=G | AA=ge a2 ae | =g2 gd BBBg | af=ge fdeB | d=gdB AAA=G ||  