Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:2/2
K:D
['d2 fd']  
X:1
L:1/8
M:2/2
K:D
"D" d2 fd a2 fd |"D" d2 fd"A" ecAc |"D" d2 fd adfd |"A" ecAc"Bm" cB B2 |"D" d2 fd adfd | 
"D" d2 fd"A" ecAc |"D" defg"A" agaf |"A" ecAc"Bm" cB B2 ::"Bm" fBdB f2 dB |"A" ABcd ecAc | 
"Bm" f2 dB fBdB |"A" ecAc"Bm" cB B2 |"Bm" fBdB fBdB |"A" ABcd ecAc |"Bm" dcdB"A" ceaf | 
"A" ecAc"Bm" cB B2 :|  