Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/4
Q:1/2=60
M:2/2
K:Cmin
['G A', 'c d']  
X:1
L:1/4
Q:1/2=60
M:2/2
K:Cmin
 E D | C2 G A | G2 F G | A G F E | D2 E D | C2 c d | e2 d c | =B c d =B | G2 F G | A G F E | 
 D2 E F | G E D C | =B2 c d | e d/c/ d c/=B/ | c G A G/F/ | E2 D2 | C3 || G | c2 c d | e2 d c | 
 g f e f | d2 c =B | c G c d | f e d c | g f e f | d2 F G | A G F E | D2 E F | G E D C | =B2 c d | 
 e d/c/ d c/=B/ | c G A G/F/ | E2 D2 | C2 |]  