Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:6/8
K:G
['', 'DGG BGB', 'dBG cBc Adc BGG G2 g |{a}']  
X:1
L:1/8
M:6/8
K:G
 dc |: B2 G DGG | BGB dcB |{d} c2 A DFA |{d} cBc edc | BGG DGG | BGB dgd |{cd} cBc Adc |1 
 BGG G2 d :|2 BGG G3 || gfa gdg | gdg bag | fdf fdf |{a} gfg a2 g | efg dgg | ege dBG | cBc Adc | 
 BGG G2 g |{a} gfa gdg | gdg bag | fdA DFA | f2 g afd | geg fdf | ecA dBG | c2{dcB} c ABc | 
 def g3 ||  