Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
M:6/8
K:D
['A2 A', 'f2 a']  
X:1
L:1/8
M:6/8
K:D
 A | def d2 B | A2 A F2 E | D2 A A2 A | Acd e2 A | def d2 B | A2 A F2 E | D2 A A2 A | ABc d2 :| e | 
 f2 a afd | c2 b bag | f2 a agf | gfg e3 | f2 a afd | c2 b bag | fgf edc | d3 d2 :|  