Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:1/8=160
M:6/8
K:Amin
['E2 A AGE A2 B c2', 'e2 a aga b2 a g2']  
X:1
L:1/8
Q:1/8=160
M:6/8
K:Amin
 D | E2 A AGE | A2 B c2 E | EDE G^FG | A2 A GED | E2 A AGE | A2 B c2 d | ege dBG | A3 A2 :| d | 
 e2 a aga | b2 a g2 f | ede g2 g | a2 e ged | e2 a aga | b2 a g2 e | age dBG | A3 A2 :|  