Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/4
M:4/4
K:C
['G B e B e2']  
X:1
L:1/4
M:4/4
K:C
 G B e B | e2 B2 | G B e B | e2 B2 | G B e B | e2 B2 |]  