Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/8
M:2/4
K:G
['d2 z']  
X:1
L:1/8
M:2/4
K:G
 D | GGGG | AAAc | BBd>c | A2 z A | AAAA | AAAd | Bed^c | d2 z d | eed^c | d2 z D | cccc | 
 B/c/A/B/GD | cccc | B/c/A/B/GB | e2 B2 | c3 B/A/ | G2 F2 | G2 z |]  