Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/8
M:6/8
K:G
['B2 c d2 d efg d3', 'B3 B3 BAc B3 B2 c d2']  
X:1
L:1/8
M:6/8
K:G
|: B2 c d2 d | efg d3 | edc dcB | cBA G2 D | B2 c d2 d | efg d3 | edd dcB | cBA G3 :: B3 B3 | 
 BAc B3 | B2 c d2 c | B2 A B2 G | B3 B3 | BAc B3 | B2 c d2 c | B2 A G2 z :|  