Compose a piece of music using the provided motif and follow the designated alphabet character structure.
X:1
L:1/8
M:2/4
K:F
['FA cF AG', 'Ff ef']  
X:1
L:1/8
M:2/4
K:F
|: FA cF | AG AG | FA cF | AG G2 | FA cF | AG Ac | d>e dc | AG F2 :: Ff ef | A>B AG | Ff ef | 
 g2 g2 | Ff ef | A>B Ac | d>e dc | AG F2 :|  