Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/16
M:4/4
K:Bb
['fg b4 c2gbgf d4']  
X:1
L:1/16
M:4/4
K:Bb
 c2bcd2fdc2dcb2g2 | b2cdcbg2 f8 | gbfgb2c2f2>d2cbg2 | b2fbgfd2 c8 | d2fdc2Bf d8 | f2>g2c2a2gf g6 | 
 fg b4 c2gbgf d4 | f2>d2cBcd f8 | B2Bcf2fdcB c6 | b2bcf2fdc2dc2<b2g | fg b4 c2gbgf d4 | 
 c2dfd2c2dc b4 c2 | b16 |]  