Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
Q:1/2=85
M:4/4
K:Bb
['d2 B2']  
X:1
L:1/8
Q:1/2=85
M:4/4
K:Bb
|:"F" c2 (3cde"Bb" d2 B2 |"F" ABcA"Bb" B2 F2 |"F" c2"Bb" (3cde d2 B2 |"F" ABcA"Bb" B4 :: 
"Bb" B,2 B,2"F" C2 C2 |"F" FGFE"Bb" D2 B,2 |"F" c2"Bb" (3cde d2 B2 |"F" ABcA"Bb" B4 :: 
"Bb" bagf edcB |"F" ABcA"Bb" B2 F2 |"F" c2"Bb" (3cde d2 B2 |"F" ABcA"Bb" B4 :|  