Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:6/8
K:Amin
['', 'c2 A B2 G E2']  
X:1
L:1/8
M:6/8
K:Amin
 E4 || c2 A B2 G | E2 G G2 E | (G3 E3) | c2 A B2 G | E2 A A2 G | A3 E3 | (E{FE}D) C2 D | 
 E2 G2 G2 E | (G3 E3) | E2 D C2 D | E2 A A2 G | A3 E3 | c2 A B2 G | E2 G G2 E | G3 E3 | c2 A B2 G | 
 E2 A A2 G | A3- A3 ||  