Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['[DBg]3 dBd', 'A3 B3 BAB G2 B d2']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
 [DBg]3 dBd | g2 B B2 d | [DBg]3 dBd | cec A3 | [DBg]3 dBd | g2 d B2 d | cec BdB | ecA A3 :: 
 B3 BAB | G2 B d2 g | B3 BdB | ecA A3 | B3 BAB | G2 B d2 B | cec Bdg | dBG G3 :|  