Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['G2 G ABc', 'G2 G', 'G>AGe dBAG g>age d2 B2 g>age dBAG', 'gdBd gdBG']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
 D2 D G2 G | ABc B2 A | BdD G2 G | ABc B2 A :: B2 c d2 d | ABc B2 A | G2 G F2 F | E2 E D2 c | 
 BdD G2 G | ABc B2 A | BdD G2 G | cBA G3 :|[M:2/4][K:G][Q:1/2=90] G>AGe | dBAG | g>age | d2 B2 | 
 g>age | dBAG | (3(ABc) BA | G2 E2 :: gdBd | gdBG | g>ef>g | a2 A2 | gdBd | gdBG | (3(ABc) BA | 
 G2 E2 :|  