Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
M:9/8
K:A
['A3 cBA ecA', 'A3 c2 e aed cBA d2 f']  
X:1
L:1/8
M:9/8
K:A
|: A3 cBA ecA | b2 B BcA GFE | A3 cBA ecA | Fdc BAG A3 :: c2 e aed cBA | d2 f bge efg | 
({b} aga)({b} aga) ecA | Fdc BAG | A3 :|  