Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/16
M:2/4
K:D
['FDFA BGBd ABAF DFAF GABG ABAF', 'AFBF Acde fafd Adfd efec Acec']  
X:1
L:1/16
M:2/4
K:D
 AG | FDFA BGBd | ABAF DFAF | GABG ABAF | EDEF E2AG | FDFA BGBd | ABAF DFAF | GABG ABAF | 
 EDCE D2 :: FG | AFBF Acde | fafd Adfd | efec Acec | agab a2FG | AFBF Acde | fafd Adfd | 
 efec Acec | dfec d2 :|  