Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:2/4
K:E
['GB BG']  
X:1
L:1/8
M:2/4
K:E
 B, | GB BG | AG FE | GB BG | F3 B, | GB BG | AG FE | E(E/G/) FE | C2 EE | B,E EE | B,E E E/E/ | 
 B,A GF | E3 ||  