Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:4/4
K:Edor
['BE E2', 'Beec d2 BA', 'BdcA BAFA BE E2']  
X:1
L:1/8
M:4/4
K:Edor
 BE E2 BdcA | BE E2 dAFA | BE E2 BdcA | dD D2 FA A2 BE E2 BdcA | BE E2 dAFA | BE E2 BdcA | 
 dD D2 ADFA || Beec d2 BA | Beed (3cBA FA | Beec dcdA | B3 c dAFA | Beec d2 BA | Beec defg | 
 af (3gfe fdec | BABc dAFA || BdcA BAFA | BE E2 ADFA | BdcA BABc | dD D2 ADFA | BdcA BAFA | 
 BE E2 BEFA | D2 FA d2 eg | fdec dAFA ||  