Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:C
['f c2 Gc ECG_B AFGE Dd-df ecBd', 'ecgc afge']  
X:1
L:1/8
M:4/4
K:C
 f | c2 Gc ECG_B | AFGE Dd-df | ecBd cGEC | FAGE Gcc :| f | ecgc afge | d_BfB dfBf | ecgc afge | 
 (B/c/d) Gf eccf | ecgc afge | d_BfB dfBg | ecBd cGEc | AFDf ecc |]  