Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:Emin
['G2 BG', 'f2 e^c dBAF']  
X:1
L:1/8
M:4/4
K:Emin
 F | G2 BG F2 AF | EBBA BGEF | G2 BG FGAc | BdAG FDD :| g | f2 e^c dBAF | EBBA BGEg | f2 e^c dBAF | 
 GBAG FDD :|  