Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/2
K:G
['', 'E2 D2']  
X:1
L:1/8
M:2/2
K:G
 A2 |:"G" B4 BAGA | BAGF E2 D2 |"G" B4 BAGA | BABd"C" e2 d2 |"G" B4 BAGA | BAGF E2 D2 | 
"G" B4 BA G2 |"Em" E3 D E2 D2 ::"C" E3 D E2 D2 | EDEF G2 D2 |"C" EDEF G2 GA |"G" B2 B2 (3ABA G2 | 
"C" E3 D E2 D2 | EDEF G2 GA |"G" B2 B2 (3ABA G2 |"Em" E3 D E4 :|  