Develop a tune according to the designated alphabetic musical pattern and the provided melody.
X:1
L:1/8
M:2/4
K:D
['af de f fe']  
X:1
L:1/8
M:2/4
K:D
 a/b/ |"D" af de | f3"Bm" f |"Em" eg"A7" fe |"D" f2"A7" da/b/ |"D" af de | f3"B7" f | 
"Em" eg"A7" fe |"D" d2-"^fine" d :| c/d/ |"A7" eA e2 |"D" fA"Bm" f2 |"Em" gg/f/"A7" ea | 
"D" f2"Bm" dc/d/ |"A7" eA e2 |"D" fA"B7" f2 |"Em" ed/c/"E7" Be |"A" A2-"^d.C" A |]  