Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/8=140
M:4/4
K:D
['', 'AFED FAAB ABde fBBA']  
X:1
L:1/8
Q:1/8=140
M:4/4
K:D
 |:"D" FAAB AFED | FAAB ABde |"Bm" fBBA Bcde |"G" f2 af"A" efdB |"D" A3 B AFED | FAAB ABde | 
"Bm" fBBA B"G"cdB | AF"A"EF"D" D2 z2 ::"D" fa a2 fdde | fdad fd d2 |"Em" gfga beef | 
"G" gebe"A" ge e2 |"D" faaf bfaf | defd efde |"G" fBBA BcdB |"A" AFEF"D" D2 z2 :|  