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:D
['dB B2 fBef', 'AB dBed f2 ef dB B2 fBec']  
X:1
L:1/8
M:4/4
K:D
|: A | DAAF AAFA | ABBA BedB | FAAF B2 AB | dBed f2 ef | dAAF AAFA | ABBA Bcde | faab a2 fe |1 
 edBA Bdd |]: |2 edBA ABB |]: c | dB B2 fBef | dB B2 fBef | dAAF B2 AB | dBed f2 ef | dB B2 fBec | 
 dBBA Bcde | faab a2 fe | edBA Bdd :|  