Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/8
M:2/4
K:D
['AA A2 BA A2 cB AG FD']  
X:1
L:1/8
M:2/4
K:D
|:"D" AA A2 | BA A2 |"A7" cB AG |1"D" FD D2 :|2"F#" FE DC |:"Bm" B,>D FF |"Em" ED C2 |"F#" FF FF | 
"Bm" B2 B2 :|  