Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:E
['CEG F2 (E E)GB e2 d c3', 'GFG Ac(e e)dB F3 FEF G3 GFE', 'E ece d2 (c c)eg f2 d']  
X:1
L:1/8
M:6/8
K:E
 CEG F2 (E | E)GB e2 d | c3 BGE | FAG F2 E | CEG F2 (E | E)GB e2 d | c3 BGE |1 F2 E4 :|2 
 F2 E2 GB |: e3 edB | G3 GFG | Ac(e e)dB | F3 FEF | G3 GFE | C3 CB,C | E2 F2 GF |1 E3 EGB :|2 E6 |: 
 ece d2 (c | c)eg f2 d | edc Bec | BGE F2 E | ece d2 (c | c)eg f2 d | edc BGE | F2 E4 :|  