Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/4
M:3/4
K:D
['A F', 'A F']  
X:1
L:1/4
M:3/4
K:D
|: F/G/ A F | D F A | c/d/ e c | d B G | F/G/ A F | D F D | E E/D/E/F/ | G F E | F/G/ A F | D F A | 
 c/d/ e f | g f e | d A F | G/A/ B G | F/E/ D C |1 D3/2 E/ D | D A G ||2 D3/2 E/ D | D a g :: 
 f d f | e c A | B B/A/B/c/ | d A F | G/A/ B G | F/G/ A F | E E/D/E/F/ | G F E | f d f | e c A | 
 B B/A/B/c/ | d A F | G/A/ B G | F/G/ A D | F/E/ D C |1 D a g ||2 D A G :|  