Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
Q:3/8=100
M:6/8
K:G
['g dBB', 'g3 aga gfe']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:G
 g | dBB BAG | dBB B2 g | dBB BAB | GGE E2 g | dBB BAG | dBB BAG | A3 BAB | GEE E2 :: f | g3 aga | 
 gfe dBG | g3 aga | gfe e2 f | gfg aga | gef g2 e | dBB BAB | GEE E2 :|  