Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/16
M:3/4
K:C
['G2c2 e2g2', 'd2f2 edcB d4']  
X:1
L:1/16
M:3/4
K:C
 vC2E2 G2c2 e2g2 | agfe fafd egec | C2E2 G2c2 e2g2 |1 g2>f2 (ef)ge d4 :|2 g2>f2 e4 d4 |]: 
 e2(eg) f2e2 d2c2 | BcBA GAGF E2D2 | CDEF GABc d2f2 | edcB d4 c4 :|  