Develop a piece of music by incorporating the provided motif and following the outlined musical structure represented by alphabet characters.
X:1
L:1/8
M:2/4
K:D
['[DAf]2 df', 'FDAF dA g2']  
X:1
L:1/8
M:2/4
K:D
 [DAf]2 df | g2 eg | [DAf]2 df | e/d/c/B/ A2 | [DAf]2 df | g2 eg | fa Ac | d2 D2 :: FDAF | dA g2 | 
 fed c/d/ | e/d/c/B/ A2 | FDAF | dA g2 | fg/a/ Ac | d2 D2 :|  