Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:3/4=50
M:3/4
K:Amin
['E2 AGABcd e2 a4 gagfed B2 g4', 'A4 E2 AGABcd gfgage agab a2 e4']  
X:1
L:1/8
Q:3/4=50
M:3/4
K:Amin
 E2 | AGABcd | e2 a4 | gagfed | B2 g4 | efedcB | A2 e4 | c2 dcBc | A4 :: E2 | AGABcd | gfgage | 
 agab a2 | e4 e2 | agfe d2 | edcB A2 | A2 B2 G2 | A4 :|  