Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/4
M:4/4
K:C
['C,2 G,,2 C,', 'C,,2 C, A,, D, D,, B,, G,,']  
X:1
L:1/4
M:4/4
K:C
 C,2 G,,2 | C, F, G, G,, | C,2 G,,2 | C, G,, C,,2 :: C, A,, D, D,, | B,, G,, C, C,, | C,2 G,,2 | 
 C, G,, C,,2 :|  