Develop a musical work using the identified alphabetic pattern and the supplied melody as a theme.
X:1
L:1/8
M:4/4
K:D
['defg affa']  
X:1
L:1/8
M:4/4
K:D
 A |"D" d2 AG FDDF |"A" GEEA"D" FDDA |"D" d2 AG FDDg |"A" fdec"D" d2 d :| A |"D" defg affa | 
"G" beed"A" cAAc |"D" defg affa |"A" beec"D" d2 dA |"D" defg affa |"G" beed"A" cAAc | 
"G" BGGB"D" FDDg |"A" fdec"D" d2 d |]  