Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:4/4
K:Dmix
['A3 G FD D2', 'GFFD C2 DE CA,A,G, A,/B,/C DE DFAd']  
X:1
L:1/8
M:4/4
K:Dmix
 d3 c A3 G | FD D2 cccc | d2 fg fdec | dAcd Accc | d2 dc A3 G | FD D2 fdec | dAcd AcAG |1 
 FDD z cc z2 :|2 FDD z DFAD |: c3 G Addc | AGAc GFFD | C2 DE CA,A,G, | A,/B,/C DE DFAd | 
 c3 G Addc | d2 fd edcA | GAcd e/g/a ge |1 d2 cc AFAd :|  