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
['B2 GB AGEG DGGF G2', 'd2 Bd gdBd']  
X:1
L:1/8
M:4/4
K:G
 B2 GB AGEG | DGGF G2 AB | c2 AB cBAG | EGAG FDGA | B2 GB AGEG | DGGF G2 A/B/c | d2 Bd gdBd | 
 cAFA G2 :| d2 Bd gdBd | d2 Bd gdBd | e2 ce agfe | defg agfe | d2 Bd gdBd | d2 Bd gdBd | 
 c2 Ac B2 GB | AGEF G2 :|  