Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/4
M:3/2
K:D
['D/E/F/G/ A D A2']  
X:1
L:1/4
M:3/2
K:D
"D" D/E/F/G/ A D A2 |"C" =c G2 =C E/F/G/E/ |"D" D/E/F/G/ A D A2 |"D" d"A" A2 G"D" F D :| 
"D" f d"G" g e"D" f d |"C" g e e =c e/f/g/e/ |"D" f d"C" e/f/g/e/"Am" a/g/f/e/ | 
"D" d"A" A2 G"D" F D :|  