Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/8
M:2/2
K:Bb
['B2 b>g fdcB', 'dBB c BGFE DEFD ECC=B cGGA BGFE']  
X:1
L:1/8
M:2/2
K:Bb
 F | B2 b>g fdcB | AFcF dFcF | B2 b>g fdcB | FBAc dBB :: c | BGFE DEFD | ECC=B cGGA | BGFE D>EFD | 
 B,BAc dBB :|  