Develop a musical composition centered around the provided motif while maintaining the appropriate form.
X:1
L:1/4
M:4/4
K:D
['a a b b a3/2 g/ f3/2', 'f e/f/ g3/2 f/ e/f/ g/e/ f2'  
X:1
L:1/4
M:4/4
K:D
 a a b b | a3/2 g/ f3/2 a/ | g f e d | d e f d | a a b b | a3/2 g/ f3/2 a/ | g f e d | d c d2 :| 
 f e/f/ g3/2 f/ | e/f/ g/e/ f2 | a g/f/ e c | d e f d | f e/f/ g3/2 f/ | e/f/ g/e/ f2 | 
 a g/f/ e d | d c d2 :|  