Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/16
M:2/4
K:G
['G4 G4 BGBd g4', 'g4 g2(3def g2d2 B2G2']  
X:1
L:1/16
M:2/4
K:G
 G4 G4 | BGBd g4 | g2d2 B2G2 | cAAG F2D2 | G4 G4 | BGBd g4 | D2F2 ABcA | B2G2 G4 :: g4 g2(3def | 
 g2d2 B2G2 | B4 B2Bc | B2A2 A4 | g4 g2(3def | g2d2 B2G2 | D2F2 ABcA | B2G2 G4 :|  