Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/8
M:6/8
K:Bb
['[BD]2 [BD] [BD]2 z f2 e dcB', 'c B2 A Bdf']  
X:1
L:1/8
M:6/8
K:Bb
|: [BD]2 [BD] [BD]2 z | f2 e dcB | [AE]2 [AE] [AE]2 z | e2 d cBA | BBB d2 z | fff b2 z | fdB fdB | 
 [cAF][cAF][cAF] [cAF]3 :: B | e2 c B2 A | Bdf f=ef | _e2 c B2 A | Bdf f2 z | g2 b agf | e2 g fed | 
 cde cAF | [BD]3 [BD]2 :|  