Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/8
Q:1/4=180
M:2/4
K:D
['D2 CD B,2 GF', 'B,4 D2 z2 D,2 ^B,2 ^B,D ^B,2', 'z2 D,2 ^B,2 ^B,D ^B,2 B,4', '^E2 =E2']  
X:1
L:1/8
Q:1/4=180
M:2/4
K:D
"^A" D2 CD | B,2 GF | EFED | B,4 |: D2 z2 | D,2 ^B,2 | ^B,D ^B,2 | B,4 ::"^B" D2 z2 | D,2 ^B,2 | 
 ^B,D ^B,2 | B,4 ::"^C" G4 | ^E4 | ^E2 =E2 | EDE^B, | D2 D2 | ^E2 E2 | ^E2 =E2 | EDE^B, | G^E G2 | 
 ^E=E ^E2 | ^E2 =E2 | EDE^B, | D2 D2 | ^E2 E2 | ^E2 =E2 | EDE^B, :|  