Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
M:2/2
K:Dmix
['F3 G', 'f2 eg']  
X:1
L:1/8
M:2/2
K:Dmix
|: F3 G ABcB | A d3 Ad d2 | F3 G ABcA | GBAG FDDE | F3 G ABcB | Add^c defg | afge fdAF | 
 GBAG FD D2 :: f2 eg fde^c | A d3 Adde | f2 eg fdAF | GBAG FD D2 | f2 eg fde^c | Add^c defg | 
 afge fdAF | GBAG FD D2 :|  