Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:6/8
K:C
['gec gec', 'def fdB gec', 'f dDDF TE>DEf gefd TedBe dDDF TE>DEg', 'f afdf a>baf gefd Te>dBf a>fdf abag']  
X:1
L:1/8
M:6/8
K:C
|: gec gec | a2 g g3 | gec gec | f2 e e3 | gec gec | afc afc | efg gfe | c3 c3 :: def fdB | 
 gec gec | def fdB | gec ceg | afa afa | geg geg | agf efd | ccc c3 :|[M:2/2][K:D] f | 
 dDDF TE>DEf | gefd TedBe | dDDF TE>DEg | fdef d/d/d d :: f | afdf a>baf | gefd Te>dBf | 
 a>fdf abag | fdef d/d/d d :|  