Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:4/4
K:D
['Ac defg afed', 'F2 D3 EFD E2 A,6 DCDE']  
X:1
L:1/8
M:4/4
K:D
 z6 Ac |:"D" defg afed |"A" cdec d2 Ac |"D" defg afed |"A" c2 A4 Ac |"D" defg afed |"A" cdec d4 | 
"G" B2 BA BcdB |1"A" AGFE"D" D2 Ac :|2"A" AGFE"D" D2 AG |]:"D" F2 D3 EFD |"A" E2 A,6 | 
"D" DCDE FGAB | d2 f2 edAG | F2 D3 EFD |"A" E2 A,6 | DCDE FAdB |1 | AGFE"D" D2 AG :|2 AGFE"D" D4 |]  