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:Dmix
['d BAB G2 F E2 F G2', 'BAB d2 d BAB']  
X:1
L:1/8
M:6/8
K:Dmix
 d | BAB G2 F | E2 F G2 A | BAB c2 B | AFD D2 d | BAB G2 F | E2 F G2 A | BAB c2 B | AFD D2 :: c | 
 BAB d2 d | BAB d2 d | BAB de=f | ecA A2 c | BAB d2 d | BAB def | gfe dcB | AFD D2 :|  