Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
Q:1/4=140
M:4/4
K:D
['A3 z c3 z d2 AG FD', 'df af']  
X:1
L:1/8
Q:1/4=140
M:4/4
K:D
"A" A3 z c3 z |:"D" d2 AG FD FA |"G" BG Bd"A" cA ce |"D" f2 fd gf ed |"A7" c2 e2 e2 A2 | 
"D" d2 AG FD FA |"G" BG Bd"A" cA ce |"D" f2 fd gf ed |1"D" A2 d2 d2 A2 :|2"D" A2 d2 d2 Ac |: 
"D" df af df af |"Em" gf ef g2 ef |"G" gf ed cd eg |"D" fe fg f2 fe |"D" df af df af | 
"Em" gf ef g2 ef |"A" gf ed ca ag |1"D" f2 d2 d2 A2 :|2"D" f2 d2 d4 |]  