Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/16
Q:1/8=70
M:2/4
K:C
["c'2bc' d'c'ba g2e2 e2de f2d2", "c4 cdef g2c'2 g2e2 c2de fedc Bcde"]  
X:1
L:1/16
Q:1/8=70
M:2/4
K:C
 c'2bc' d'c'ba | g2e2 e2de | f2d2 d2ed | cdef g4 | c'2bc' d'c'ba | g2e2 e2de | f2d2 dfed | 
 c2e2 c4 :: cdef g2c'2 | g2e2 c2de | fedc Bcde |1 fgab a2g2 :|2 fgab c'4 ||  