Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:4/4
K:G
['g2 df g2', 'BdGd BdGd BdGg edcB']  
X:1
L:1/8
M:4/4
K:G
 d2 | g2 df g2 df | g2 dg edcB | ceAe ceAe | ceag fdef | g2 df g2 df | g2 dg edcB | cded cBAG | 
 D2 F2 G2 || dc | BdGd BdGd | BdGg edcB | ceAe ceAe | ceAa fedc | BdGd BdGd | BdGg edcB | 
 cded cBAG | D2 F2 G2 ||  