Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:6/8
K:Amin
['E2 E2 DE FED CB,A, B,CD EDC', 'CA,B, A,3 CA,B,']  
X:1
L:1/8
M:6/8
K:Amin
|: E2 E2 DE | FED CB,A, | B,CD EDC | B,DC B,C/B,/A, | E2 E2 DE | FED CB,A, | B,CD EDC | 
 B,DC B,C/B,/A, :: CA,B, A,3 | CA,B, A,3 | CA,B, CDC | B,DC B,C/B,/A, | CA,B, A,3 | CA,B, A,3 | 
 CA,B, CDC | B,DC B,C/B,/A, :|  