Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:6/8
K:Dmix
['A2 G', 'AdB c3']  
X:1
L:1/8
M:6/8
K:Dmix
 A2 G ADD | A2 G Adc | A2 G ADD | EFG EFG :| AdB c3 | Add efg | AdB c3 | EDE GED | AdB c3 | 
 Add efg | fge dcA | GEF GED ||  