Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
Q:1/4=120
M:3/8
K:G
['D GAB AGF E/F/GE A2 D AAB', 'E2 D']  
X:1
L:1/8
Q:1/4=120
M:3/8
K:G
 D | GAB | AGF | E/F/GE | A2 D | AAB | A2 d | d/c/BA |1 BG :|2 G2 || D | G2 D | E2 D | G/G/GD | 
 E2 D | GGA | BGB | A/G/FA | G2 :|  