Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/4=88
M:2/4
K:F
['c2 d2', 'fedc fdcB']  
X:1
L:1/8
Q:1/4=88
M:2/4
K:F
|:"^Andante" c2 d2 | c>BAB | c2 d2 | c>B A2 | c2 cc | d2 ef | e2 Td>c | c4 :: G>AGA | B2 B2 | 
 ABAB | c2 c2 | fedc | fdcB | A<c GA/B/ | B2 A2 | fedc | fdcB | A2 TG>F | F4 |]  