Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/8
M:4/4
K:D
['a3 f']  
X:1
L:1/8
M:4/4
K:D
|:"A7" A2 c2"D" d3 d |"A7" dcde"D" e2 d2 |"Bm" d2 f2"F#m" a3 f |"G" fe"A7"dc |"D" d4 :: 
"G" b2 b2"D" a3 d |"Em" g2"A7" g2"D" f4 |"G" b2 b2"D" a3 f |"A7" fedc |"D" d4 :|  