Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/8
Q:1/2=100
M:2/2
K:D
['defd g2 fe defd ecBA dfeg fafd']  
X:1
L:1/8
Q:1/2=100
M:2/2
K:D
 defd g2 fe | defd ecBA | dfeg fafd | Adce d4 |:  