Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/8
M:3/4
K:G
['B3 A Bd', 'e3 f']  
X:1
L:1/8
M:3/4
K:G
 D2 | B3 A Bd | B3 A Bd | E3 B AB | D3 B AG | B3 A Bd | B3 A Bd | G3 B AB | G4 :: Bd | e3 f ed | 
 B3 A Bd | ef ed Bd | e3 f gf | e3 f ed | B3 A Bd | D2 EB AB | G4 :|  