Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/8
M:2/4
K:Ab
['A2 B2']  
X:1
L:1/8
M:2/4
K:Ab
 E | A2 B2 | cedc | B2 z c | dcBA | GBEE | A2 B2 | c>ded | c2 B2 | A2 z c | Bcde | d2 c2 | B2 z B | 
 cdef | e2 d2 | c2 z E | A2 B2 | cedc | B2 z c | dcBA | GBEE | A2 B2 | c>ded | c2 B2 | A2 z |]  