Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/16
Q:1/4=90
M:3/8
K:G
['ef g2e2f2 d2BdBd cBABcd e2d2ef g2f2e2 d2BdBd', 'cAB2G2 Bcd2e2 e2 d4 efg2e2 d2BdBd |1']  
X:1
L:1/16
Q:1/4=90
M:3/8
K:G
 ef | g2e2f2 | d2BdBd | cBABcd | e2d2ef | g2f2e2 | d2BdBd | cBABcA |1 G2Bd :|2 G6 |: A2>G2AB | 
 cAB2G2 | Bcd2e2 | e2 d4 | efg2e2 | d2BdBd |1 c2AcAc | B2A2G2 :|2 cBABcA | G4 z2 ||  