Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:2/2
K:D
['DFED dfed cAGF (Ec) c2 DFED dfef', 'D2 fefg fagf eAce g2 (ag) fede']  
X:1
L:1/8
M:2/2
K:D
 DFED dfed | cAGF (Ec) c2 | DFED dfef | cAGE AFGE | DFED dfed | cAGF (Ec) c2 | DFED dfef | 
 cAGE (AD) D2 :: fefg fagf | eAce g2 (ag) | fede fage | fdec Adde | fede fagf | ecAc e2 (gA) | 
 fgef decd | cAGE AD D2 :|  