Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:2/2
K:D
['D/E/F/G/ AD BDAD', 'fdeA fdeA']  
X:1
L:1/8
M:2/2
K:D
 D/E/F/G/ AD BDAD | FABd B2 E2 | D/E/F/G/ AD BDAD | cefg Tf2 d2 :: g | fdeA fdeA | FABd B2 E2 | 
 fdeA fdeA | cefg Tf2 d2 :|  