Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:6/8
K:D
['g2 c', 'c ef g>gg g>fe f>ef f2 e']  
X:1
L:1/8
M:6/8
K:D
 G | G2 c c>Bc | def g2 c | A2 A _BAG | c3- c2 G | G>cc c>Bc | d>ef g2 c | A>AA _BAG | c3- c || 
 ef | g>gg g>fe | f>ef f2 e | def g>ed | c3 B2 G | G>cc c>Bc | d>ef g2 c | A>AA _BAG | c3- c ||  